The police still haven’t found the lost child，but they’re doing all they ________．

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• 1I can't leave.  She told me that I _____ stay here until she comes back.   

  A.can

  B.must

  C.will

  D.may

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• 2There was a lot of fun at yesterday's party. You ______, but why didn't you?   

  A.should come

  B.must have com

  C.may have come

  D.ought to have come

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• 3— Sorry,  Professor Smith. I didn't finish the assignment (作业, 功课) yesterday.  — Oh, you____have done it as  yesterday was the deadline (最后期限).    

  A.must

  B.mustn't

  C.should

  D.shouldn't

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• 4Sorry, Cathy, I didn't know  ____   that you were badly short of money then. But youme for help.

  A.must have asked

  B.could have asked

  C.would have asked

  D.may have asked

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• 5I have told you the truth. ____ I keep repeating it?    

  A.Must

  B.Can

  C.May

  D.Will

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• 6I       use a clock to wake me up because at six o'clock each morning the train comesby my house.           

  A.couldn't

  B.mustn't

  C.shouldn't

  D.needn't

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• 7— I regret to say that I failed to rank first in the contest.   — Come on, nobody ______win all the time.  

  A.should

  B.must

  C.shall

  D.can

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• 8— Tom is never late for work. Why is he absent today?— Something __________to him.      

  A.must happen

  B.should have happened

  C.could have happened

  D.must have happened

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• 9At first sight, it ________ look like a generous offer; actually, it is a trick.

  A.may

  B.must

  C.shall

  D.should

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• 10If you ______ go,  at least wait the storm is over.

  A.can

  B.may

  C.must

  D.will

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