To make our city more beautiful, rubbish _ _ into the river. [

题型：同步题难度：来源：

To make our city more beautiful, rubbish _      _ into the river.          [     ]
A. needn"t be thrown
B. mustn"t be thrown
C. can"t throw

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举一反三

Could you please _       me the book?             [     ]
A. passed
B. pass
C. to pass

题型：同步题难度：| 查看答案

—Must I hand in my exercise book now?
—No, you _      .             [     ]
A. needn"t
B. can"t
C. mustn"t

题型：同步题难度：| 查看答案

She __________ know the answer, but I"m not sure.        [     ]
A. can
B. will
C. may
D. must

题型：期末题难度：| 查看答案

—Look !  It _       be Mr Zhang.
—No, it _      be Mr Zhang.  He has gone to Paris.         [     ]
A. may; must
B. must; can
C. must ; can"t
D. can ; must

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—Must I leave now?
—You _                [     ]
A. needn’t
B. mustn’t
C. won’t
D. must

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