MERRILL LYNCH MASSACHUSETTS MUNICIPAL BOND FUND
N-30D, 2000-09-07
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                                                                   MERRILL LYNCH
                                                                   MASSACHUSETTS
                                                                   MUNICIPAL
                                                                   BOND FUND

                                 [GRAPHIC OMITTED]

                                                          STRATEGIC
                                                                   Performance

                                                                   Annual Report
                                                                   July 31, 2000
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

TO OUR SHAREHOLDERS

The Municipal Market Environment

During the six months ended July 31, 2000, US domestic economic growth remained
robust. After growing at a 4.2% annual rate in 1999, US domestic economic growth
expanded at a 4.8% rate during the first quarter of 2000 and at a 5.2% rate
during the second quarter. However, despite these significant growth rates, few
price measure indicators have shown any meaningful signs of future price
pressures at the consumer level, despite the lowest unemployment rates since
1970. With few signs of any economic slowdown, the Federal Reserve Board
continued to raise short-term interest rates in February, March and May 2000.
The Federal Reserve Board cited both the continued growth of US employment and
the continued strength of US equity markets as reasons for attempting to
moderate US economic growth before inflationary price pressures can occur.

However, since then fixed-income markets have largely ignored strong economic
fundamentals and concentrated upon very positive technical supply factors.
Declining bond issuance--both current, and more importantly, expected future
issuance--helped push bond yields lower into mid-April 2000. In late January and
early February 2000, the US Treasury announced its intention to reduce the
amounts to be auctioned in the quarterly Treasury note and bond auctions.
Furthermore, budgetary surpluses allowed the US Treasury to repurchase
outstanding, higher-couponed Treasury issues, primarily in the 15-year and
longer maturity sector. Both these actions resulted in significant reduction in
the outstanding supply of longer-dated maturity US Treasury debt. Domestic and
international investors quickly began to accumulate what was expected to become
a scarce commodity and bond prices quickly rose.

By mid-April 2000, US Treasury bond yields had declined more than 80 basis
points (0.80%) to 5.67%. During the remainder of the period, US Treasury bond
prices were volatile as strong economic reports and investors' concerns of
additional moves by the Federal Reserve Board occasionally overshadowed the
positive technical position of the long-term US Treasury bond market.

Recently, a number of economic indicators have begun to suggest that the actions
taken by the Federal Reserve Board in 1999 and early 2000 have started to affect
US economic growth. Both new home sales and consumer spending have slowed,
suggesting that economic growth may subside into a 4%-4.5% range by late 2000.
In our opinion, this range of growth was targeted by the Federal Reserve Board
as being sustainable, given current productivity measures, without endangering
the present benign inflationary environment.

By June, investor focus returned to the dwindling supply of long-term US
Treasury securities and bond prices generally rose for the remainder of the
period. The decline in long-term US Treasury bond yields resulted in an inverted
yield curve as short-term and intermediate-term interest rates did not fall
proportionately to long-term interest rates as the Federal Reserve Board was
expected to continue to raise short-term interest rates. The current inversion
has had as much to do with debt reduction and US Treasury buybacks as with
investor expectations of slower economic growth. During the last six months, US
Treasury bond yields have declined more than 70 basis points to end the period
at 5.78%, their lowest monthly closing level since May 1999.

Tax-exempt bond yields also have declined in recent months. The decline has
largely been in response to the rally in US Treasury securities, as well as a
continued positive technical supply environment. States such as California and
Maryland have announced that their large current and anticipated future budget
surpluses will permit the cancellation or postponement of expected bond
issuance. Additionally, some issuers have also initiated tenders to repurchase
existing debt, reducing the supply of tax-exempt bonds in the secondary market
as well. Given the decline in available long-term US Treasury securities, some
investors who need longer maturity investment vehicles have begun to consider
long-term municipal bonds as potential substitutes. This has further
strengthened the overall positive technical position of the tax-exempt market.
During the last six months, long-term municipal revenue bond yields have
declined nearly 50 basis points to 5.85%, their lowest level since late August
1999, as measured by the Bond Buyer Revenue Bond Index.

The recent relative underperformance of the municipal bond market in recent
months has been especially disappointing given the strong technical


1
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

position the tax-exempt bond market has enjoyed. The issuance of long-term
tax-exempt securities has dramatically declined. During the last year, almost
$200 billion in new long-term municipal securities was issued, a decline of
almost 20% compared to the same period a year earlier. For the six months ended
July 31, 2000, approximately $100 billion in new tax-exempt bonds was
underwritten, a decline of 17% compared to the same period in 1999.

Although investors received more than $45 billion in coupon payments, bond
maturities and the proceeds from early bond redemptions during June and July,
overall investor demand has diminished. Long-term municipal bond mutual funds
have seen consistent outflows in recent months as the yields of individual
securities have risen faster than those of larger, more diverse mutual funds.
Thus far this year, tax-exempt mutual funds have had net redemptions of more
than $12 billion.

However, the rate at which these redemptions have been occurring has slowed in
recent months. Recent US equity market volatility, especially in the NASDAQ, has
reduced some investor interest in the stock market. This investor interest,
especially earlier this year, had been siphoning away demand for municipal bonds
by retail investors. Also, the demand from property and casualty companies is
expected to increase in the coming months. These firms are becoming more
profitable after experiencing losses in the past few years resulting from a
series of weather-related natural disasters. Yet as positive as the tax-exempt
bond market's technical environment has been for much of this year, investor
response to the reduction in both current and future supply of US Treasury bonds
has been overwhelmingly positive and municipal bond yields have underperformed
their taxable counterparts.

Significantly lower municipal bond yields are still likely to require weaker US
employment growth and consumer spending. The actions taken in recent months by
the Federal Reserve Board should eventually slow US economic growth. Recent
declines in US new home sales are perhaps the first sign that consumer spending
is being slowed by higher interest rates. Until further signs develop, it is
likely that the municipal bond market's current favorable technical position
will dampen significant tax-exempt interest rate volatility and provide a stable
environment for eventual improvement in municipal bond prices.

Fiscal Year in Review

With interest rates under pressure for much of the fiscal year ended July 31,
2000, our portfolio strategy focused on seeking to insulate the Fund from
volatility, while still maintaining an attractive dividend. As an asset class,
tax-exempt bonds faced tough competition from a surging equity market and
mounting pressures from a monetary policy designed to curb economic growth and
prevent inflation. Until recently, investor appetite for tax-exempt products had
waned, as demonstrated by the consistent outflows throughout the mutual fund
industry. This environment was also characterized by declining year-over-year
municipal issuance.

In our last letter to shareholders, we spoke about the various factors
contributing to the tax-exempt market's weak performance relative to the
Treasury market. At the same time, we noted the compelling value reflected in
the yields available on medium-term to long-term tax-exempt securities and our
growing level of comfort with evolving market fundamentals. Given this
investment outlook, we positioned the Fund in an effort to further benefit from
both a decline in interest rates and renewed investor appetite for municipal
bonds.

Initially, portfolio activity consisted primarily of efforts to modestly extend
duration (a measure of sensitivity to interest rate fluctuations) as well as to
upgrade the average credit quality of our investments. Credit spreads, having
already widened appreciably throughout 1999, were still viewed as susceptible to
additional pressure and a potential drag on a fixed-income portfolio in a
declining interest rate environment. Our efforts, in conjunction with
maintaining minimal cash reserves, contributed to a significant improvement in
the Fund's performance for the second half of the fiscal year ended July 31,
2000. In an effort to limit volatility, we shifted our portfolio strategy to
achieve a more neutral position. While market fundamentals remain positive, the
extent of the recent rally, combined with the uncertain outcome of the November
elections, suggests a more cautious approach in the near term.


2
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

For the year ended July 31, 2000, the Fund's Class A, Class B, Class C and Class
D Shares had total returns of +1.38%, +0.86%, +0.76% and +1.28%, respectively.
(Investment results shown do not reflect sales charges and would be lower if
sales charges were included. Complete performance information can be found on
pages 4 and 5 of this report to shareholders.) The Fund's total returns
underperformed the average return for all Massachusetts Municipal Debt Funds, as
measured by Lipper Analytical Services, Inc.

Massachusetts continues to exhibit strong credit fundamentals as the local
economy has demonstrated steady growth in personal income and employment,
outpacing that of the nation. Offsetting factors include a heavy debt burden
that is likely to remain for the foreseeable future; three ballot initiatives
potentially resulting in reduced tax revenues; and overruns related to the
Central Artery/Ted Williams Tunnel project, which could possibly impinge on the
Commonwealth's currently large financial margins.

In Conclusion

We appreciate your ongoing interest in Merrill Lynch Massachusetts Municipal
Bond Fund, and we look forward to assisting you with your financial needs in the
months and years ahead.

Sincerely,


/s/ Terry K. Glenn

Terry K. Glenn
President and Trustee


/s/ Vincent R. Giordano

Vincent R. Giordano
Senior Vice President


/s/ Theodore R. Jaeckel Jr.

Theodore R. Jaeckel Jr.
Vice President and Portfolio Manager

September 1, 2000


3
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

PERFORMANCE DATA

About Fund Performance

Investors are able to purchase shares of the Fund through the Merrill Lynch
Select Pricing(SM) System, which offers four pricing alternatives:

o     Class A Shares incur a maximum initial sales charge (front-end load) of 4%
      and bear no ongoing distribution or account maintenance fees. Class A
      Shares are available only to eligible investors.

o     Class B Shares are subject to a maximum contingent deferred sales charge
      of 4% if redeemed during the first year, decreasing 1% each year
      thereafter to 0% after the fourth year. In addition, Class B Shares are
      subject to a distribution fee of 0.25% and an account maintenance fee of
      0.25%. These shares automatically convert to Class D Shares after
      approximately 10 years. (There is no initial sales charge for automatic
      share conversions.)

o     Class C Shares are subject to a distribution fee of 0.35% and an account
      maintenance fee of 0.25%. In addition, Class C Shares are subject to a 1%
      contingent deferred sales charge if redeemed within one year of purchase.

o     Class D Shares incur a maximum initial sales charge of 4% and an account
      maintenance fee of 0.10% (but no distribution fee).

      None of the past results shown should be considered a representation of
      future performance. Figures shown in the "Recent Performance Results" and
      "Average Annual Total Return" tables assume reinvestment of all dividends
      and capital gains distributions at net asset value on the payable date.
      Investment return and principal value of shares will fluctuate so that
      shares, when redeemed, may be worth more or less than their original cost.
      Dividends paid to each class of shares will vary because of the different
      levels of account maintenance, distribution and transfer agency fees
      applicable to each class, which are deducted from the income available to
      be paid to shareholders.

Average Annual Total Return

                                       % Return Without      % Return With
                                         Sales Charge        Sales Charge**
================================================================================
Class A Shares*
================================================================================
One Year Ended 6/30/00                       +0.18%              -3.82%
--------------------------------------------------------------------------------
Five Years Ended 6/30/00                     +4.48               +3.63
--------------------------------------------------------------------------------
Inception (2/28/92)
through 6/30/00                              +5.74               +5.22
--------------------------------------------------------------------------------
 * Maximum sales charge is 4%.
** Assuming maximum sales charge.

                                          % Return             % Return
                                         Without CDSC         With CDSC**
================================================================================
Class B Shares*
================================================================================
One Year Ended 6/30/00                       -0.33%            -4.11%
--------------------------------------------------------------------------------
Five Years Ended 6/30/00                     +3.95             +3.95
--------------------------------------------------------------------------------
Inception (2/28/92)
through 6/30/00                              +5.20             +5.20
--------------------------------------------------------------------------------
 * Maximum contingent deferred sales charge is 4% and is reduced to 0% after 4
   years.
** Assuming payment of applicable contingent deferred sales charge.

================================================================================
                                          % Return             % Return
                                         Without CDSC         With CDSC**
================================================================================
Class C Shares*
--------------------------------------------------------------------------------
One Year Ended 6/30/00                       -0.52%            -1.47%
--------------------------------------------------------------------------------
Five Years Ended 6/30/00                     +3.85             +3.85
--------------------------------------------------------------------------------
Inception (10/21/94)
through 6/30/00                              +4.70             +4.70
--------------------------------------------------------------------------------
 * Maximum contingent deferred sales charge is 1% and is reduced to 0% after 1
   year.
** Assuming payment of applicable contingent deferred sales charge.

================================================================================
                                       % Return Without      % Return With
                                         Sales Charge        Sales Charge**
================================================================================
Class D Shares*
================================================================================
One Year Ended 6/30/00                       -0.01%            -4.01%
--------------------------------------------------------------------------------
Five Years Ended 6/30/00                     +4.38             +3.53
--------------------------------------------------------------------------------
Inception (10/21/94)
through 6/30/00                              +5.26             +4.51
--------------------------------------------------------------------------------
 * Maximum sales charge is 4%.
** Assuming maximum sales charge.


4
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

PERFORMANCE DATA (concluded)

Total Return Based on a $10,000 Investment

ML Massachusetts Municipal Bond Fund's Class A and Class B Shares--
Total Return Based on a $10,000 Investment

A line graph depicting the growth of an investment in the Portfolio's Class A
Shares and Class B Shares compared to growth of an investment in the Lehman
Brothers Municipal Bond Index. Beginning and ending values are:

                                          2/28/92**          7/00
ML Massachusetts
Municipal Bond Fund+--
Class A Shares*                           $ 9,600           $15,531
ML Massachusetts
Municipal Bond Fund+--
Class B Shares*                           $10,000           $15,503
Lehman Brothers Municipal
Bond Index++                              $10,000           $17,100


ML Massachusetts Municipal Bond Fund's Class C and Class D Shares--
Total Return Based on a $10,000 Investment

A line graph depicting the growth of an investment in the Portfolio's Class C
and Class D Shares compared to growth of an investment in the Lehman Brothers
Municipal Bond Index. Beginning and ending values are:

                                          10/21/94**         7/00
ML Massachusetts
Municipal Bond Fund+--
Class C Shares*                           $10,000           $13,190
ML Massachusetts
Municipal Bond Fund+--
Class D Shares*                           $ 9,600           $13,060
Lehman Brothers Municipal
Bond Index++                              $10,000           $14,849

*     Assuming maximum sales charge, transaction costs and other operating
      expenses, including advisory fees.
**    Commencement of operations.
+     ML Massachusetts Municipal Bond Fund invests primarily in long-term
      investment-grade obligations issued by or on behalf of the Commonwealth of
      Massachusetts, its political subdivisions, agencies and instrumentalities
      and obligations of other qualifying issuers.
++    This unmanaged Index consists of long-term revenue bonds, prerefunded
      bonds, general obligation bonds and insured bonds. The starting date for
      the Index in the Class C & Class D Shares' graph is from 10/31/94.
Past performance is not predictive of future performance.

Recent Performance Results*

<TABLE>
<CAPTION>
                                                               6 Month       12 Month     Since Inception   Standardized
As of July 31, 2000                                         Total Return   Total Return    Total Return     30-Day Yield
========================================================================================================================
<S>                                                             <C>           <C>             <C>               <C>
ML Massachusetts Municipal Bond Fund Class A Shares             +6.99%        +1.38%          +61.79%           4.13%
------------------------------------------------------------------------------------------------------------------------
ML Massachusetts Municipal Bond Fund Class B Shares             +6.72         +0.86           +55.03            3.80
------------------------------------------------------------------------------------------------------------------------
ML Massachusetts Municipal Bond Fund Class C Shares             +6.67         +0.76           +31.90            3.70
------------------------------------------------------------------------------------------------------------------------
ML Massachusetts Municipal Bond Fund Class D Shares             +6.93         +1.28           +36.03            4.04
------------------------------------------------------------------------------------------------------------------------
</TABLE>

*     Investment results shown do not reflect sales charges; results would be
      lower if a sales charge was included. Total investment returns are based
      on changes in net asset values for the periods shown, and assume
      reinvestment of all dividends and capital gains distributions at net asset
      value on the payable date. The Fund's since inception dates are from
      2/28/92 for Class A & Class B Shares and from 10/21/94 for Class C & Class
      D Shares.


5
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

SCHEDULE OF INVESTMENTS                                           (in Thousands)

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
S&P      Moody's   Face
Ratings  Ratings  Amount                                          Issue                                                        Value
------------------------------------------------------------------------------------------------------------------------------------
Massachusetts--95.8%
------------------------------------------------------------------------------------------------------------------------------------
<C>      <C>      <C>      <S>                                                                                               <C>
AAA      Aa2      $1,000   Massachusetts Bay Transportation Authority Revenue Bonds (General Transportation
                           System), Series A, 7% due 3/01/2021                                                               $ 1,166
------------------------------------------------------------------------------------------------------------------------------------
AA-      Aa2       1,750   Massachusetts Bay Transportation Authority, Revenue Refunding Bonds (General
                           Transportation System), Series A, 7% due 3/01/2011                                                  2,032
------------------------------------------------------------------------------------------------------------------------------------
AAA      Aaa         720   Massachusetts Education Loan Authority, Education Loan Revenue Bonds, AMT, Issue E,
                           Series A, 7.375% due 1/01/2012 (a)                                                                    764
------------------------------------------------------------------------------------------------------------------------------------
AAA      Aaa         920   Massachusetts Educational Financing Authority, Education Loan Revenue Refunding Bonds,
                           AMT, Issue E, 5.85% due 7/01/2014 (a)                                                                 936
------------------------------------------------------------------------------------------------------------------------------------
BBB+     NR*       1,000   Massachusetts State Development Finance Agency Revenue Bonds (YMCA of Greater
                           Boston Issue), 5.45% due 11/01/2028                                                                   863
------------------------------------------------------------------------------------------------------------------------------------
BBB+     A3        2,500   Massachusetts State Development Finance Agency, Revenue Refunding Bonds (Boston
                           University), Series P, 5.45% due 5/15/2059                                                          2,230
------------------------------------------------------------------------------------------------------------------------------------
AAA      Aaa       2,000   Massachusetts State, HFA, Residential Development Revenue Refunding Bonds, Series C,
                           6.875% due 11/15/2011 (c)                                                                           2,098
------------------------------------------------------------------------------------------------------------------------------------
AAA      Aaa       1,655   Massachusetts State, HFA, S/F Housing Revenue Bonds, AMT, Series 48,
                           6.35% due 6/01/2026 (e)                                                                             1,678
------------------------------------------------------------------------------------------------------------------------------------
A+       Aa3       1,980   Massachusetts State, HFA, S/F Housing Revenue Refunding Bonds, AMT, Series 40,
                           6.65% due 12/01/2027                                                                                2,035
------------------------------------------------------------------------------------------------------------------------------------
                           Massachusetts State Health and Educational Facilities Authority Revenue Bonds:
NR*      VMIG1@      200     (Capital Asset Program), VRDN, Series E, 4.25% due 1/01/2035 (i)                                    200
AAA      Aaa       5,150     (Medical Center of Central Massachusetts), CARS, Series B, 8.48% due 6/23/2022 (a)(h)             5,839
------------------------------------------------------------------------------------------------------------------------------------
                           Massachusetts State Health and Educational Facilities Authority, Revenue Refunding Bonds:
NR*      Ba2         660     (Bay Cove Human Services Issue), Series A, 5.85% due 4/01/2004                                      646
AAA      Aaa          85     (Boston College), Series J, 6.625% due 7/01/2021 (b)                                                 88
AAA      NR*       2,450     (Brandeis University), Series I, 4.75% due 10/01/2028 (e)                                         2,095
A1+      VMIG1@    1,300     (Capital Asset Program), VRDN, Series C, 4.05% due 7/01/2010 (e)(i)                               1,300
AAA      Aaa       2,000     (Massachusetts General Hospital), Series F, 6.25% due 7/01/2012 (a)                               2,209
NR*      Ca          915     (New England Memorial Hospital), Series B, 6.125% due 7/01/2013 (f)                                 183
AAA      Aaa       1,000     (Northeastern University), Series E, 6.55% due 10/01/2022 (e)                                     1,053
AAA      Aaa         450     (Stonehill College), Series E, 6.60% due 7/01/2002 (e)(g)                                           476
AAA      Aaa         550     (Stonehill College), Series E, 6.60% due 7/01/2020 (e)                                              578
NR*      A2        1,000     (Wheaton College), Series C, 5.25% due 7/01/2019                                                    952
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

PORTFOLIO ABBREVIATIONS

To simplify the listings of Merrill Lynch Massachusetts Municipal Bond Fund's
portfolio holdings in the Schedule of Investments, we have abbreviated the names
of many of the securities according to the list at right.

AMT   Alternative Minimum Tax (subject to)
CARS  Complementary Auction Rate Securities
GO    General Obligation Bonds
HFA   Housing Finance Agency
S/F   Single-Family
VRDN  Variable Rate Demand Notes


6
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

SCHEDULE OF INVESTMENTS (concluded)                               (in Thousands)

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
S&P      Moody's   Face
Ratings  Ratings  Amount                                          Issue                                                        Value
------------------------------------------------------------------------------------------------------------------------------------
Massachusetts (concluded)
------------------------------------------------------------------------------------------------------------------------------------
<C>      <C>      <C>      <S>                                                                                               <C>
BBB      NR*      $1,500   Massachusetts State Industrial Financial Agency, Resource Recovery Revenue Refunding
                           Bonds (Ogden Haven Hill Project), AMT, Series A, 5.60% due 12/01/2019                             $ 1,311
------------------------------------------------------------------------------------------------------------------------------------
AA+      Aa3       1,680   Massachusetts State Water Pollution Abatement Trust, Water Pollution Abatement Revenue
                           Bonds (Secured Loan Program), Series A, 6.375% due 2/01/2015                                        1,786
------------------------------------------------------------------------------------------------------------------------------------
                           Massachusetts State Water Resource Authority Revenue Bonds, Series A:
A+       A1        6,000     6.50% due 7/15/2019                                                                               6,716
AAA      Aaa         930     4.75% due 8/01/2027 (d)                                                                             796
------------------------------------------------------------------------------------------------------------------------------------
NR*      Aaa       1,600   Montachusett, Massachusetts, Regional Vocational Technical School District, GO,
                           5.95% due 1/15/2020 (e)                                                                             1,660
------------------------------------------------------------------------------------------------------------------------------------
AAA      Aaa       1,210   Southern Berkshire, Massachusetts, Regional School District, GO, 7% due 4/15/2011 (e)               1,286
------------------------------------------------------------------------------------------------------------------------------------
NR*      Baa3      1,500   Springfield, Massachusetts, GO (School Project Loan), Series B, 7.10% due 9/01/2002 (g)             1,605
------------------------------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------------------------------
Puerto Rico--0.6%
------------------------------------------------------------------------------------------------------------------------------------
A1+      VMIG1@      300   Puerto Rico Commonwealth, Highway and Transportation Authority, Transportation Revenue
                           Refunding Bonds, VRDN, Series A, 3.85% due 7/01/2028 (a)(i)                                           300
------------------------------------------------------------------------------------------------------------------------------------
Total Investments (Cost--$44,149)--96.4%                                                                                      44,881
Other Assets Less Liabilities--3.6%                                                                                            1,679
                                                                                                                             -------
Net Assets--100.0%                                                                                                           $46,560
                                                                                                                             =======
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
(a)   AMBAC Insured.
(b)   FGIC Insured.
(c)   FNMA Collateralized.
(d)   FSA Insured.
(e)   MBIA Insured.
(f)   Non-income producing security.
(g)   Prerefunded.
(h)   The interest rate is subject to change periodically and inversely based
      upon prevailing market rates. The interest rate shown is the rate in
      effect at July 31, 2000.
(i)   The interest rate is subject to change periodically based upon prevailing
      market rates. The interest rate shown is the rate in effect at July 31,
      2000.
@     Highest short-term rating by Moody's Investors Service, Inc.
*     Not Rated.

Ratings of issues shown have not been audited by Deloitte & Touche LLP.

See Notes to Financial Statements.


7
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

FINANCIAL INFORMATION

Statement of Assets and Liabilities as of July 31, 2000

<TABLE>
<C>                  <S>                                                                               <C>             <C>
Assets:              Investments, at value (identified cost--$44,148,831) ...........................                  $ 44,880,664
                     Cash ...........................................................................                        61,204
                     Receivables:
                       Securities sold ..............................................................  $  1,300,000
                       Interest .....................................................................       508,360
                       Beneficial interest sold .....................................................        32,749       1,841,109
                                                                                                       ------------
                     Prepaid registration fees and other assets .....................................                         6,508
                                                                                                                       ------------
                     Total assets ...................................................................                    46,789,485
                                                                                                                       ------------
-----------------------------------------------------------------------------------------------------------------------------------
Liabilities:         Payables:
                       Dividends to shareholders ....................................................        41,637
                       Beneficial interest redeemed .................................................        40,360
                       Investment adviser ...........................................................        20,299
                       Distributor ..................................................................        16,169         118,465
                                                                                                       ------------
                     Accrued expenses and other liabilities .........................................                       111,287
                                                                                                                       ------------
                     Total liabilities ..............................................................                       229,752
                                                                                                                       ------------
-----------------------------------------------------------------------------------------------------------------------------------
Net Assets:          Net assets .....................................................................                  $ 46,559,733
                                                                                                                       ============
-----------------------------------------------------------------------------------------------------------------------------------
Net Assets           Class A Shares of beneficial interest, $.10 par value, unlimited number of
Consist of:          shares authorized ..............................................................                  $     38,644
                     Class B Shares of beneficial interest, $.10 par value, unlimited number of
                     shares authorized ..............................................................                       364,154
                     Class C Shares of beneficial interest, $.10 par value, unlimited number of
                     shares authorized ..............................................................                        26,214
                     Class D Shares of beneficial interest, $.10 par value, unlimited number of
                     shares authorized ..............................................................                        28,811
                     Paid-in capital in excess of par ...............................................                    47,827,579
                     Accumulated realized capital losses on investments--net ........................                    (2,101,210)
                     Accumulated distribution in excess of realized capital gains--net ..............                      (356,292)
                     Unrealized appreciation on investments--net ....................................                       731,833
                                                                                                                       ------------
                     Net assets .....................................................................                  $ 46,559,733
                                                                                                                       ============
-----------------------------------------------------------------------------------------------------------------------------------
Net Asset Value:     Class A--Based on net assets of $3,930,243 and 386,440 shares
                     of beneficial interest outstanding .............................................                  $      10.17
                                                                                                                       ============
                     Class B--Based on net assets of $37,034,940 and 3,641,543 shares
                     of beneficial interest outstanding .............................................                  $      10.17
                                                                                                                       ============
                     Class C--Based on net assets of $2,663,635 and 262,141 shares
                     of beneficial interest outstanding .............................................                  $      10.16
                                                                                                                       ============
                     Class D--Based on net assets of $2,930,915 and 288,112 shares
                     of beneficial interest outstanding .............................................                  $      10.17
                                                                                                                       ============
-----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

See Notes to Financial Statements.


8
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

FINANCIAL INFORMATION (continued)

Statement of Operations

<TABLE>
<CAPTION>
                                                                                                 For the Year Ended
                                                                                                      July 31, 2000
-------------------------------------------------------------------------------------------------------------------
<C>                  <S>                                                                <C>             <C>
Investment Income:   Interest and amortization of premium and discount earned .......                   $ 3,024,703
-------------------------------------------------------------------------------------------------------------------
Expenses:            Investment advisory fees .......................................   $   273,560
                     Account maintenance and distribution fees--Class B .............       197,655
                     Professional fees ..............................................        76,259
                     Accounting services ............................................        67,762
                     Printing and shareholder reports ...............................        28,181
                     Transfer agent fees--Class B ...................................        19,953
                     Account maintenance and distribution fees--Class C .............        16,916
                     Registration fees ..............................................        11,800
                     Custodian fees .................................................         6,313
                     Trustees' fees and expenses ....................................         5,671
                     Pricing fees ...................................................         4,154
                     Account maintenance fees--Class D ..............................         3,094
                     Transfer agent fees--Class A ...................................         1,772
                     Transfer agent fees--Class C ...................................         1,382
                     Transfer agent fees--Class D ...................................         1,275
                     Other ..........................................................         2,059
                                                                                        -----------
                     Total expenses .................................................                       717,806
                                                                                                        -----------
                     Investment income--net .........................................                     2,306,897
                                                                                                        -----------
-------------------------------------------------------------------------------------------------------------------
Realized &           Realized loss on investments--net ..............................                    (1,728,839)
Unrealized Loss on   Change in unrealized appreciation on investments--net ..........                      (558,007)
Investments--Net:                                                                                       -----------
                     Net Increase in Net Assets Resulting from Operations ..........                    $    20,051
                                                                                                        ===========
-------------------------------------------------------------------------------------------------------------------
</TABLE>

See Notes to Financial Statements.


9
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

FINANCIAL INFORMATION (continued)

Statements of Changes in Net Assets

<TABLE>
<CAPTION>
                                                                                                        For the Year Ended July 31,
                                                                                                       ----------------------------
Increase (Decrease) in Net Assets:                                                                         2000            1999
-----------------------------------------------------------------------------------------------------------------------------------
<C>                  <S>                                                                               <C>             <C>
Operations:          Investment income--net ........................................................   $  2,306,897    $  2,609,314
                     Realized gain (loss) on investments--net ......................................     (1,728,839)        961,543
                     Change in unrealized appreciation on investments--net .........................       (558,007)     (3,934,953)
                                                                                                       ------------    ------------
                     Net increase (decrease) in net assets resulting from operations ...............         20,051        (364,096)
                                                                                                       ------------    ------------
-----------------------------------------------------------------------------------------------------------------------------------
Dividends &          Investment income--net:
Distributions to       Class A .....................................................................       (218,251)       (258,922)
Shareholders:          Class B .....................................................................     (1,808,290)     (2,055,046)
                       Class C .....................................................................       (126,177)       (137,236)
                       Class D .....................................................................       (154,179)       (158,110)
                     In excess of realized gain on investments--net:
                       Class A .....................................................................        (30,447)             --
                       Class B .....................................................................       (283,915)             --
                       Class C .....................................................................        (18,997)             --
                       Class D .....................................................................        (22,933)             --
                                                                                                       ------------    ------------
                     Net decrease in net assets resulting from dividends and distributions
                     to shareholders ...............................................................     (2,663,189)     (2,609,314)
                                                                                                       ------------    ------------
-----------------------------------------------------------------------------------------------------------------------------------
Beneficial Interest  Net decrease in net assets derived from beneficial interest transactions ......     (9,325,797)       (129,628)
Transactions:                                                                                          ------------    ------------
-----------------------------------------------------------------------------------------------------------------------------------
Net Assets:          Total decrease in net assets ..................................................    (11,968,935)     (3,103,038)
                     Beginning of year .............................................................     58,528,668      61,631,706
                                                                                                       ------------    ------------
                     End of year ...................................................................   $ 46,559,733    $ 58,528,668
                                                                                                       ============    ============
-----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

See Notes to Financial Statements.


10
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

FINANCIAL INFORMATION (continued)

Financial Highlights

<TABLE>
<CAPTION>
                                                                                                  Class A
The following per share data and ratios have been derived                  --------------------------------------------------------
from information provided in the financial statements.                                    For the Year Ended July 31,
                                                                           --------------------------------------------------------
Increase (Decrease) in Net Asset Value:                                      2000        1999        1998        1997        1996
-----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                        <C>         <C>         <C>         <C>         <C>
Per Share            Net asset value, beginning of year ................   $  10.63    $  11.15    $  11.07    $  10.60    $  10.46
Operating                                                                  --------    --------    --------    --------    --------
Performance:         Investment income--net ............................        .51         .51         .56         .56         .56
                     Realized and unrealized gain (loss) on
                     investments--net ..................................       (.39)       (.52)        .08         .47         .14
                                                                           --------    --------    --------    --------    --------
                     Total from investment operations ..................        .12        (.01)        .64        1.03         .70
                                                                           --------    --------    --------    --------    --------
                     Less dividends and distributions:
                       Investment income--net ..........................       (.51)       (.51)       (.56)       (.56)       (.56)
                       In excess of realized gain on
                       investments--net ................................       (.07)         --          --          --          --
                                                                           --------    --------    --------    --------    --------
                     Total dividends and distributions .................       (.58)       (.51)       (.56)       (.56)       (.56)
                                                                           --------    --------    --------    --------    --------
                     Net asset value, end of year ......................   $  10.17    $  10.63    $  11.15    $  11.07    $  10.60
                                                                           ========    ========    ========    ========    ========
-----------------------------------------------------------------------------------------------------------------------------------
Total Investment     Based on net asset value per share ................      1.38%       (.21%)      5.92%      10.02%       6.78%
Return:*                                                                   ========    ========    ========    ========    ========
-----------------------------------------------------------------------------------------------------------------------------------
Ratios to Average    Expenses ..........................................      1.00%        .95%        .86%        .83%        .84%
Net Assets:                                                                ========    ========    ========    ========    ========
                     Investment income--net ............................      5.07%       4.58%       5.02%       5.22%       5.23%
                                                                           ========    ========    ========    ========    ========
-----------------------------------------------------------------------------------------------------------------------------------
Supplemental         Net assets, end of year (in thousands) ............   $  3,930    $  5,080    $  5,705    $  5,757    $  5,887
Data:                                                                      ========    ========    ========    ========    ========
                     Portfolio turnover ................................     25.66%      89.30%      23.32%      24.64%      56.05%
                                                                           ========    ========    ========    ========    ========
-----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

* Total investment returns exclude the effects of sales charges.

  See Notes to Financial Statements.


11
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

FINANCIAL INFORMATION (continued)

Financial Highlights (continued)

<TABLE>
<CAPTION>
                                                                                                  Class B
The following per share data and ratios have been derived                  --------------------------------------------------------
from information provided in the financial statements.                                    For the Year Ended July 31,
                                                                           --------------------------------------------------------
Increase (Decrease) in Net Asset Value:                                      2000        1999        1998        1997        1996
-----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                        <C>         <C>         <C>         <C>         <C>
Per Share            Net asset value, beginning of year ................   $  10.63    $  11.15    $  11.07    $  10.60    $  10.46
Operating                                                                  --------    --------    --------    --------    --------
Performance:         Investment income--net ............................        .46         .45         .50         .51         .51
                     Realized and unrealized gain (loss) on
                     investments--net ..................................       (.39)       (.52)        .08         .47         .14
                                                                           --------    --------    --------    --------    --------
                     Total from investment operations ..................        .07        (.07)        .58         .98         .65
                                                                           --------    --------    --------    --------    --------
                     Less dividends and distributions:
                       Investment income--net ..........................       (.46)       (.45)       (.50)       (.51)       (.51)
                       In excess of realized gain on
                       investments--net ................................       (.07)         --          --          --          --
                                                                           --------    --------    --------    --------    --------
                     Total dividends and distributions .................       (.53)       (.45)       (.50)       (.51)       (.51)
                                                                           --------    --------    --------    --------    --------
                     Net asset value, end of year ......................   $  10.17    $  10.63    $  11.15    $  11.07    $  10.60
                                                                           ========    ========    ========    ========    ========
-----------------------------------------------------------------------------------------------------------------------------------
Total Investment     Based on net asset value per share ................       .86%       (.71%)      5.38%       9.46%       6.23%
Return:*                                                                   ========    ========    ========    ========    ========
-----------------------------------------------------------------------------------------------------------------------------------
Ratios to Average    Expenses ..........................................      1.50%       1.46%       1.37%       1.34%       1.35%
Net Assets:                                                                ========    ========    ========    ========    ========
                     Investment income--net ............................      4.56%       4.07%       4.51%       4.71%       4.72%
                                                                           ========    ========    ========    ========    ========
-----------------------------------------------------------------------------------------------------------------------------------
Supplemental         Net assets, end of year (in thousands) ............   $ 37,035    $ 45,988    $ 51,255    $ 53,336    $ 59,868
Data:                                                                      ========    ========    ========    ========    ========
                     Portfolio turnover ................................     25.66%      89.30%      23.32%      24.64%      56.05%
                                                                           ========    ========    ========    ========    ========
-----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

* Total investment returns exclude the effects of sales charges.

  See Notes to Financial Statements.


12
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

FINANCIAL INFORMATION (continued)

Financial Highlights (continued)

<TABLE>
<CAPTION>
                                                                                                  Class C
The following per share data and ratios have been derived                  --------------------------------------------------------
from information provided in the financial statements.                                    For the Year Ended July 31,
                                                                           --------------------------------------------------------
Increase (Decrease) in Net Asset Value:                                      2000        1999        1998        1997        1996
-----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                        <C>         <C>         <C>         <C>         <C>
Per Share            Net asset value, beginning of year ................   $  10.62    $  11.14    $  11.06    $  10.60    $  10.46
Operating                                                                  --------    --------    --------    --------    --------
Performance:         Investment income--net ............................        .45         .44         .49         .49         .49
                     Realized and unrealized gain (loss) on
                     investments--net ..................................       (.39)       (.52)        .08         .46         .14
                                                                           --------    --------    --------    --------    --------
                     Total from investment operations ..................        .06        (.08)        .57         .95         .63
                                                                           --------    --------    --------    --------    --------
                     Less dividends and distributions:
                       Investment income--net ..........................       (.45)       (.44)       (.49)       (.49)       (.49)
                       In excess of realized gain on
                       investments--net ................................       (.07)         --          --          --          --
                                                                           --------    --------    --------    --------    --------
                     Total dividends and distributions .................       (.52)       (.44)       (.49)       (.49)       (.49)
                                                                           --------    --------    --------    --------    --------
                     Net asset value, end of year ......................   $  10.16    $  10.62    $  11.14    $  11.06    $  10.60
                                                                           ========    ========    ========    ========    ========
-----------------------------------------------------------------------------------------------------------------------------------
Total Investment     Based on net asset value per share ................       .76%       (.81%)      5.28%       9.25%       6.12%
Return:*                                                                   ========    ========    ========    ========    ========
-----------------------------------------------------------------------------------------------------------------------------------
Ratios to Average    Expenses ..........................................      1.60%       1.57%       1.47%       1.43%       1.45%
Net Assets:                                                                ========    ========    ========    ========    ========
                     Investment income--net ............................      4.46%       3.96%       4.40%       4.63%       4.61%
                                                                           ========    ========    ========    ========    ========
-----------------------------------------------------------------------------------------------------------------------------------
Supplemental         Net assets, end of year (in thousands) ............   $  2,664    $  3,814    $  1,835    $  1,495    $  1,185
Data:                                                                      ========    ========    ========    ========    ========
                     Portfolio turnover ................................     25.66%      89.30%      23.32%      24.64%      56.05%
                                                                           ========    ========    ========    ========    ========
-----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

* Total investment returns exclude the effects of sales charges.

  See Notes to Financial Statements.


13
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

FINANCIAL INFORMATION (concluded)

Financial Highlights (concluded)

<TABLE>
<CAPTION>
                                                                                                  Class D
The following per share data and ratios have been derived                  --------------------------------------------------------
from information provided in the financial statements.                                    For the Year Ended July 31,
                                                                           --------------------------------------------------------
Increase (Decrease) in Net Asset Value:                                      2000        1999        1998        1997        1996
-----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                        <C>         <C>         <C>         <C>         <C>
Per Share            Net asset value, beginning of year ................   $  10.63    $  11.15    $  11.07    $  10.61    $  10.47
Operating                                                                  --------    --------    --------    --------    --------
Performance:         Investment income--net ............................        .50         .50         .55         .55         .55
                     Realized and unrealized gain (loss) on
                     investments--net ..................................       (.39)       (.52)        .08         .46         .14
                                                                           --------    --------    --------    --------    --------
                     Total from investment operations ..................        .11        (.02)        .63        1.01         .69
                                                                           --------    --------    --------    --------    --------
                     Less dividends and distributions:
                       Investment income--net ..........................       (.50)       (.50)       (.55)       (.55)       (.55)
                       In excess of realized gain on
                       investments--net ................................       (.07)         --          --          --          --
                                                                           --------    --------    --------    --------    --------
                     Total dividends and distributions .................       (.57)       (.50)       (.55)       (.55)       (.55)
                                                                           --------    --------    --------    --------    --------
                     Net asset value, end of year ......................   $  10.17    $  10.63    $  11.15    $  11.07    $  10.61
                                                                           ========    ========    ========    ========    ========
-----------------------------------------------------------------------------------------------------------------------------------
Total Investment     Based on net asset value per share ................      1.28%       (.30%)      5.82%       9.80%       6.67%
Return:*                                                                   ========    ========    ========    ========    ========
-----------------------------------------------------------------------------------------------------------------------------------
Ratios to Average    Expenses ..........................................      1.09%       1.06%        .96%        .93%        .94%
Net Assets:                                                                ========    ========    ========    ========    ========
                     Investment income--net ............................      4.97%       4.47%      4.91%        5.13%       5.12%
                                                                           ========    ========    ========    ========    ========
-----------------------------------------------------------------------------------------------------------------------------------
Supplemental         Net assets, end of year (in thousands) ............   $  2,931    $  3,647    $  2,837    $  1,602    $  1,290
Data:                                                                      ========    ========    ========    ========    ========
                     Portfolio turnover ................................     25.66%      89.30%      23.32%      24.64%      56.05%
                                                                           ========    ========    ========    ========    ========
-----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

* Total investment returns exclude the effects of sales charges.

  See Notes to Financial Statements.


14
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

NOTES TO FINANCIAL STATEMENTS

1. Significant Accounting Policies:

Merrill Lynch Massachusetts Municipal Bond Fund (the "Fund") is part of Merrill
Lynch Multi-State Municipal Series Trust (the "Trust"). The Fund is registered
under the Investment Company Act of 1940 as a non-diversified, open-end
management investment company. The Fund's financial statements are prepared in
accordance with accounting principles generally accepted in the United States of
America, which may require the use of management accruals and estimates. The
Fund offers four classes of shares under the Merrill Lynch Select Pricing(SM)
System. Shares of Class A and Class D are sold with a front-end sales charge.
Shares of Class B and Class C may be subject to a contingent deferred sales
charge. All classes of shares have identical voting, dividend, liquidation and
other rights and the same terms and conditions, except that Class B, Class C and
Class D Shares bear certain expenses related to the account maintenance of such
shares, and Class B and Class C Shares also bear certain expenses related to the
distribution of such shares. Each class has exclusive voting rights with respect
to matters relating to its account maintenance and distribution expenditures.
The following is a summary of significant accounting policies followed by the
Fund.

(a) Valuation of investments--Municipal bonds and other portfolio securities in
which the Fund invests are traded primarily in the over-the-counter municipal
bond and money markets and are valued at the last available bid price in the
over-the-counter market or on the basis of yield equivalents as obtained from
one or more dealers that make markets in the securities. Financial futures
contracts and options thereon, which are traded on exchanges, are valued at
their settlement prices as of the close of such exchanges. Short-term
investments with remaining maturities of sixty days or less are valued at
amortized cost, which approximates market value. Securities and assets for which
market quotations are not readily available are valued at fair value as
determined in good faith by or under the direction of the Board of Trustees of
the Trust, including valuations furnished by a pricing service retained by the
Trust, which may utilize a matrix system for valuations. The procedures of the
pricing service and its valuations are reviewed by the officers of the Trust
under the general supervision of the Trustees.

(b) Derivative financial instruments--The Fund may engage in various portfolio
investment strategies to increase or decrease the level of risk to which the
Fund is exposed more quickly and efficiently than transactions in other types of
instruments. Losses may arise due to changes in the value of the contract or if
the counterparty does not perform under the contract.

o Financial futures contracts--The Fund may purchase or sell financial futures
contracts and options on such futures contracts for the purpose of hedging the
market risk on existing securities or the intended purchase of securities.
Futures contracts are contracts for delayed delivery of securities at a specific
future date and at a specific price or yield. Upon entering into a contract, the
Fund deposits and maintains as collateral such initial margin as required by the
exchange on which the transaction is effected. Pursuant to the contract, the
Fund agrees to receive from or pay to the broker an amount of cash equal to the
daily fluctuation in value of the contract. Such receipts or payments are known
as variation margin and are recorded by the Fund as unrealized gains or losses.
When the contract is closed, the Fund records a realized gain or loss equal to
the difference between the value of the contract at the time it was opened and
the value at the time it was closed.

(c) Income taxes--It is the Fund's policy to comply with the requirements of the
Internal Revenue Code applicable to regulated investment companies and to
distribute substantially all of its taxable income to its shareholders.
Therefore, no Federal income tax provision is required.

(d) Security transactions and investment income--Security transactions are
recorded on the dates the transactions are entered into (the trade dates).
Interest income is recognized on the accrual basis. Discounts and market
premiums are amortized into interest income. Realized gains and losses on
security transactions are determined on the identified cost basis.

(e) Prepaid registration fees--Prepaid registration fees are charged to expense
as the related shares are issued.

(f) Dividends and distributions--Dividends from net investment income are
declared daily and paid monthly. Distributions of capital gains are recorded on
the ex-dividend dates. Distributions in excess of


15
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

NOTES TO FINANCIAL STATEMENTS (continued)

realized capital gains are due primarily to differing tax treatments for futures
transactions and post-October losses.

2. Investment Advisory Agreement and Transactions with Affiliates:

The Fund has entered into an Investment Advisory Agreement with Fund Asset
Management, L.P. ("FAM"). The general partner of FAM is Princeton Services, Inc.
("PSI"), an indirect wholly-owned subsidiary of Merrill Lynch & Co., Inc. ("ML &
Co."), which is the limited partner. The Fund has also entered into a
Distribution Agreement and Distribution Plans with FAM Distributors, Inc.
("FAMD" or the "Distributor"), which is a wholly-owned subsidiary of Merrill
Lynch Group, Inc.

FAM is responsible for the management of the Fund's portfolio and provides the
necessary personnel, facilities, equipment and certain other services necessary
to the operations of the Fund. For such services, the Fund pays a monthly fee
based upon the average daily value of the Fund's net assets at the following
annual rates: .55% of the Fund's average daily net assets not exceeding $500
million; .525% of average daily net assets in excess of $500 million but not
exceeding $1 billion; and .50% of average daily net assets in excess of $1
billion.

Pursuant to the Distribution Plans adopted by the Fund in accordance with Rule
12b-1 under the Investment Company Act of 1940, the Fund pays the Distributor
ongoing account maintenance and distribution fees. The fees are accrued daily
and paid monthly at annual rates based upon the average daily net assets of the
shares as follows:

--------------------------------------------------------------------------------
                                                     Account        Distribution
                                                 Maintenance Fee        Fee
--------------------------------------------------------------------------------
Class B ......................................        .25%             .25%
Class C ......................................        .25%             .35%
Class D ......................................        .10%              --
--------------------------------------------------------------------------------

Pursuant to a sub-agreement with the Distributor, Merrill Lynch, Pierce, Fenner
& Smith Incorporated ("MLPF&S"), a subsidiary of ML & Co., also provides account
maintenance and distribution services to the Fund. The ongoing account
maintenance fee compensates the Distributor and MLPF&S for providing account
maintenance services to Class B, Class C and Class D shareholders. The ongoing
distribution fee compensates the Distributor and MLPF&S for providing
shareholder and distribution-related services to Class B and Class C
shareholders.

For the year ended July 31, 2000, FAMD earned underwriting discounts and MLPF&S
earned dealer concessions on sales of the Fund's Class A and Class D Shares as
follows:

--------------------------------------------------------------------------------
                                                       FAMD           MLPF&S
--------------------------------------------------------------------------------

Class A ..........................................     $ 58           $  750
Class D ..........................................     $599           $3,897
--------------------------------------------------------------------------------

For the year ended July 31, 2000, MLPF&S received contingent deferred sales
charges of $41,869 and $7,596 relating to transactions in Class B and Class C
Shares, respectively.

Financial Data Services, Inc. ("FDS"), a wholly-owned subsidiary of ML & Co., is
the Fund's transfer agent.

Accounting services are provided to the Fund by FAM at cost.

Certain officers and/or trustees of the Fund are officers and/or directors of
FAM, PSI, FDS, FAMD, and/or ML & Co.

3. Investments:

Purchases and sales of investments, excluding short-term securities, for the
year ended July 31, 2000 were $12,195,454 and $24,388,893, respectively.

Net realized gains (losses) for the year ended July 31, 2000 and net unrealized
gains as of July 31, 2000 were as follows:

--------------------------------------------------------------------------------
                                                  Realized           Unrealized
                                                Gains (Losses)         Gains
--------------------------------------------------------------------------------
Long-term investments ...................        $(1,857,069)        $   731,833
Financial futures contracts .............            128,230                  --
                                                 -----------         -----------
Total ...................................        $(1,728,839)        $   731,833
                                                 ===========         ===========
--------------------------------------------------------------------------------


16
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

As of July 31, 2000, net unrealized appreciation for Federal income tax purposes
aggregated $731,833, of which $2,037,073 related to appreciated securities and
$1,305,240 related to depreciated securities. The aggregate cost of investments
at July 31, 2000 for Federal income tax purposes was $44,148,831.

4. Beneficial Interest Transactions:

Net decrease in net assets derived from beneficial interest transactions was
$9,325,797 and $129,628 for the years ended July 31, 2000 and July 31, 1999,
respectively.

Transactions in shares of beneficial interest for each class were as follows:

--------------------------------------------------------------------------------
Class A Shares for the Year                                           Dollar
Ended July 31, 2000                                Shares             Amount
--------------------------------------------------------------------------------
Shares sold ..................................       20,599        $    206,043
Shares issued to shareholders
in reinvestment of dividends
and distributions ............................       10,663             106,659
                                               ------------        ------------
Total issued .................................       31,262             312,702
Shares redeemed ..............................     (122,611)         (1,230,778)
                                               ------------        ------------
Net decrease .................................      (91,349)       $   (918,076)
                                               ============        ============
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
Class A Shares for the Year                                           Dollar
Ended July 31, 1999                                Shares             Amount
--------------------------------------------------------------------------------
Shares sold ..................................       82,772        $    924,254
Shares issued to shareholders
in reinvestment of dividends .................        9,936             110,112
                                               ------------        ------------
Total issued .................................       92,708           1,034,366
Shares redeemed ..............................     (126,725)         (1,402,310)
                                               ------------        ------------
Net decrease .................................      (34,017)       $   (367,944)
                                               ============        ============
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
Class B Shares for the Year                                           Dollar
Ended July 31, 2000                                Shares             Amount
--------------------------------------------------------------------------------
Shares sold ..................................      283,023        $  2,846,709
Shares issued to shareholders
in reinvestment of dividends
and distributions ............................      107,915           1,078,734
                                               ------------        ------------
Total issued .................................      390,938           3,925,443
Automatic conversion
of shares ....................................      (18,267)           (185,116)
Shares redeemed ..............................   (1,056,706)        (10,623,099)
                                               ------------        ------------
Net decrease .................................     (684,035)       $ (6,882,772)
                                               ============        ============
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
Class B Shares for the Year                                           Dollar
Ended July 31, 1999                                Shares             Amount
--------------------------------------------------------------------------------
Shares sold ..................................      529,211        $  5,897,022
Shares issued to shareholders
in reinvestment of dividends .................       97,126           1,076,842
                                               ------------        ------------
Total issued .................................      626,337           6,973,864
Automatic conversion
of shares ....................................       (4,517)            (48,743)
Shares redeemed ..............................     (894,470)         (9,884,471)
                                               ------------        ------------
Net decrease .................................     (272,650)       $ (2,959,350)
                                               ============        ============
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
Class C Shares for the Year                                           Dollar
Ended July 31, 2000                                Shares             Amount
--------------------------------------------------------------------------------
Shares sold ..................................       86,247        $    860,601
Shares issued to shareholders
in reinvestment of dividends
and distributions ............................       11,955             119,548
                                               ------------        ------------
Total issued .................................       98,202             980,149
Shares redeemed ..............................     (195,078)         (1,956,183)
                                               ------------        ------------
Net decrease .................................      (96,876)       $   (976,034)
                                               ============        ============
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
Class C Shares for the Year                                           Dollar
Ended July 31, 1999                                Shares             Amount
--------------------------------------------------------------------------------
Shares sold ..................................      275,198        $  3,090,519
Shares issued to shareholders
in reinvestment of dividends .................       10,688             117,964
                                               ------------        ------------
Total issued .................................      285,886           3,208,483
Shares redeemed ..............................      (91,629)         (1,010,515)
                                               ------------        ------------
Net increase .................................      194,257        $  2,197,968
                                               ============        ============
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
Class D Shares for the Year                                           Dollar
Ended July 31, 2000                                Shares             Amount
--------------------------------------------------------------------------------
Shares sold ..................................       51,622        $    518,180
Automatic conversion
of shares ....................................       18,268             185,116
Shares issued to shareholders
in reinvestment of dividends
and distributions ............................        5,491              54,903
                                               ------------        ------------
Total issued .................................       75,381             758,199
Shares redeemed ..............................     (130,149)         (1,307,114)
                                               ------------        ------------
Net decrease .................................      (54,768)       $   (548,915)
                                               ============        ============
--------------------------------------------------------------------------------


17
<PAGE>

Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

NOTES TO FINANCIAL STATEMENTS (concluded)

--------------------------------------------------------------------------------
Class D Shares for the Year                                           Dollar
Ended July 31, 1999                                Shares             Amount
--------------------------------------------------------------------------------
Shares sold ..................................      141,301        $  1,584,586
Automatic conversion
of shares ....................................        4,514              48,743
Shares issued to shareholders
in reinvestment of dividends .................        4,215              46,523
                                               ------------        ------------
Total issued .................................      150,030           1,679,852
Shares redeemed ..............................      (61,590)           (680,154)
                                               ------------        ------------
Net increase .................................       88,440        $    999,698
                                               ============        ============
--------------------------------------------------------------------------------

5. Short-Term Borrowings:

On December 3, 1999, the Fund, along with certain other funds managed by FAM and
its affiliates, entered into a one-year, unsecured $1,000,000,000 credit
agreement with The Bank of New York and other lenders. The funds may borrow
money for temporary or emergency purposes to meet shareholder redemptions. Each
fund may borrow up to the maximum amount allowable under the fund's current
prospectus and statement of additional information, subject to various other
legal, regulatory or contractual limits. The funds collectively pay a commitment
fee of .09% per annum on the available portion of the facility. Amounts borrowed
under the facility bear interest at the Federal Funds rate plus .50%. The Fund
did not borrow from the facility during the year ended July 31, 2000.

6. Capital Loss Carryforward:

At July 31, 2000, the Fund had a net capital loss carryforward of approximately
$474,000, all of which expires in 2008. This amount will be available to offset
like amounts of any future taxable gains.

INDEPENDENT AUDITORS' REPORT

The Board of Trustees and Shareholders,
Merrill Lynch Massachusetts Municipal Bond Fund
of Merrill Lynch Multi-State Municipal Series Trust:

We have audited the accompanying statement of assets and liabilities, including
the schedule of investments, of Merrill Lynch Massachusetts Municipal Bond Fund
of Merrill Lynch Multi-State Municipal Series Trust as of July 31, 2000, the
related statements of operations for the year then ended and changes in net
assets for each of the years in the two-year period then ended, and the
financial highlights for each of the years in the five-year period then ended.
These financial statements and the financial highlights are the responsibility
of the Fund's management. Our responsibility is to express an opinion on these
financial statements and the financial highlights based on our audits.

We conducted our audits in accordance with auditing standards generally accepted
in the United States of America. Those standards require that we plan and
perform the audit to obtain reasonable assurance about whether the financial
statements and the financial highlights are free of material misstatement. An
audit includes examining, on a test basis, evidence supporting the amounts and
disclosures in the financial statements. Our procedures included confirmation of
securities owned at July 31, 2000 by correspondence with the custodian. An audit
also includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement
presentation. We believe that our audits provide a reasonable basis for our
opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of Merrill Lynch
Massachusetts Municipal Bond Fund of Merrill Lynch Multi-State Municipal Series
Trust as of July 31, 2000, the results of its operations, the changes in its net
assets, and the financial highlights for the respective stated periods in
conformity with accounting principles generally accepted in the United States of
America.


Deloitte & Touche LLP
Princeton, New Jersey
September 5, 2000


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Merrill Lynch Massachusetts Municipal Bond Fund                    July 31, 2000

IMPORTANT TAX INFORMATION (unaudited)

All of the net investment income distributions paid monthly by Merrill Lynch
Massachusetts Municipal Bond Fund during its taxable year ended July 31, 2000
qualify as tax-exempt interest dividends for Federal income tax purposes.

Additionally, the following table summarizes the taxable distributions paid by
the Fund during the year:

--------------------------------------------------------------------------------
Record                  Payable               Ordinary               Long-Term
Date                     Date                  Income             Capital Gains*
--------------------------------------------------------------------------------
12/20/99               12/31/99               $.001742               $.069493
--------------------------------------------------------------------------------
* This entire distribution is subject to a maximum 20% tax rate.

Please retain this information for your records.

OFFICERS AND TRUSTEES

Terry K. Glenn, President and Trustee
James H. Bodurtha, Trustee
Herbert I. London, Trustee
Joseph L. May, Trustee
Andre F. Perold, Trustee
Arthur Zeikel, Trustee
Vincent R. Giordano, Senior Vice President
Kenneth A. Jacob, Vice President
Theodore R. Jaeckel Jr., Vice President
Donald C. Burke, Vice President and Treasurer
Alice A. Pellegrino, Secretary

Custodian

State Street Bank and Trust Company
P.O. Box 351
Boston, MA 02101

Transfer Agent

Financial Data Services, Inc.
4800 Deer Lake Drive East
Jacksonville, FL 32246-6484
(800) 637-3863


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This report is not authorized for use as an offer of sale or a solicitation of
an offer to buy shares of the Fund unless accompanied or preceded by the Fund's
current prospectus. Past performance results shown in this report should not be
considered a representation of future performance. Investment return and
principal value of shares will fluctuate so that shares, when redeemed, may be
worth more or less than their original cost. Statements and other information
herein are as dated and are subject to change.

Merrill Lynch Massachusetts
Municipal Bond Fund
Merrill Lynch Multi-State
Municipal Series Trust
Box 9011
Princeton, NJ
08543-9011                                                          #16150--7/00

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