Some students who are not talkative are not necessarily shy; they ________ just be quiet people．

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• 1Someone saw him go to the lab. He ________ be there now.

  A.might

  B.may

  C.must

  D.could

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• 2He ________ recite (背诵) some poems at the age of four.

  A.could

  B.liked

  C.was able to

  D.was fond of

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• 3He ought ________ have done so even though possible.

  A.not to

  B.to not

  C.not

  D.never

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• 4The box has been moved. Someone ________ here last night.

  A.must be

  B.must have been

  C.was

  D.must come

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• 5The man has been standing in front of the museum for a long time . He ________ for somebody.

  A.must have waited

  B.should have waited

  C.can be waiting

  D.must be waiting

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• 6I have never dined with you, sir, and I see no reason ______.

  A.how can I know

  B.how I ought to know

  C.why shall I know

  D.why I would know

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• 7Chidlren under 12 year of age in that country ________ be under adult supervision when is a public library.

  A.must

  B.may

  C.can

  D.need

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• 8You ________ to meet at the school gate at 8: 30 tomorrow morning.

  A.should

  B.must

  C.ought to

  D.are supposed

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• 9If the bear ________ come again, we will try to shoot it dead.

  A.dared to

  B.dare

  C.dare to

  D.dares

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• 10The traffic light is red, so I ________ stop my ear.

  A.must

  B.have to

  C.can

  D.need

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