Often he _________ sit for hours doing nothing at all when he was in low spirits.

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• 1 I got up early this morning, but I ________ so because I was not on duty today.

  A.mustn't have done

  B.needn't have done

  C.didn't need to do

  D.can't have done

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• 2 — Shall I go and buy more food and drinks for the party? — No, we have prepared a fridge of those. That ______ be quite enough.

  A.can

  B.may

  C.might

  D.Should

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• 3Sir, you ______be sitting in this waiting-room. It is for women and children only.

  A.oughtn't to

  B.can't

  C.won't

  D.needn't

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• 4 You___________use your cell phone here in our hospital because of the disturbance to the electronic equipments! It's forbidden．

  A.shouldn't

  B.may not

  C.needn't

  D.mustn't

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• 5—I want to know if I__________ smoke here. —No, you _________.Could you see the sign “NO SMOKING” there?

  A.can; needn't

  B.must; can't

  C.shall; won't

  D.may; mustn't

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• 6 Just as I was sitting down to supper, the telephone______.

  A.must ring

  B.might have rung

  C.would ring

  D.would have rung

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• 7 —Peter looked tired and a little absent-minded at the meeting． —He _____ up too late．

  A.may stay

  B.could stay

  C.should have stayed

  D.must have stayed

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• 8 _______ the plane have taken off on time? --- I'm afraid not. The fog was too thick then.

  A.Would

  B.Should

  C.Can

  D.Must

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• 9He chose to teach in a western province, though he _______ in the city for a better life.

  A.could stay

  B.would stay

  C.could have stayed

  D.had stayed

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• 10 ---Is there any flight to New York? --- I think there ______ be, for it is snowing so heavily.

  A.shouldn't

  B.mustn't

  C.can't

  D.needn't

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