Why _______ you keep troubling your mother with such question while he is busy .

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• 1—Tom didn't come last night,did he? —No.I _______ have waited for him.A whole night was wasted.

  A.would

  B.should

  C.couldn't

  D.needn't

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• 2The tourists didn't stop to rest at each station because it ______them down.

  A.had slowed

  B.would slow

  C.should have slowed

  D.would have slowed

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• 3Water _______ be changed into vapour but it _______ be heated to its boiling point .

  A.may ; can

  B.can ; must

  C.may ; needn't

  D.must ; may

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• 4He _________ to the party this afternoon if he has something important to do.

  A.needs not go

  B.needn't go

  C.doesn't need going

  D.doesn't need go

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• 5—My little daughter is coughing worse than ever. —She__________to the hospital yesterday.

  A.had to be taken

  B.should have taken

  C.must have been taken

  D.ought to have been taken

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• 6--Listen! Someone is knocking at the door. -- ______ be Mary. She has just been to Beijing

  A.She mustn't

  B.It can't

  C.It must

  D.She may

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• 7Mary__________my letter;otherwise she would have replied before now.

  A.has received

  B.ought to have received

  C.couldn't have received

  D.shouldn't have received

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• 8I would have gone to visit him in the hospital，had it been at all possible，but I _________ fully occupied the whole of last week.

  A.were

  B.had been

  C.have been

  D.was

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• 9I _______ have been more than six years old when the accident happened.

  A.shouldn't

  B.couldn't

  C.mustn't

  D.needn't

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• 10I am glad that you have managed to come.You _______ have brought wine.We've got plenty.

  A.wouldn't

  B.couldn't

  C.mustn't

  D.needn't

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