It is hard to say what kind of person he is. Sometimes he is very friendly;  at other times he ___ be very cold.

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• 1— Hi, Tom. Any idea where Jane is? — She _____ in the classroom. I saw her there just now.

  A.shall be

  B.should have been

  C.must be

  D.might have been

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• 2As is natural, a snake like this _____ be very dangerous.

  A.must

  B.may

  C.should

  D.can

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• 3— Where is my dictionary? I remember I put it here yesterday. — You _____ it in the wrong place.

  A.must put

  B.should have put

  C.might put

  D.might have put

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• 4The room is in a terrible mess, it _____ have been cleaned.

  A.can't

  B.mustn't

  C.shouldn't

  D.wouldn't

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• 5You ____ finish the work today, for you still have three days left.

  A.won't

  B.mustn't

  C.can't

  D.needn't

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• 6How _____ you say that you really understand the whole story if you have covered only part of the article?

  A.can

  B.must

  C.need

  D.may

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• 7Among the 15-year-old children, some ____ studying in university while others are still learning to read and write.

  A.should have been

  B.would have been

  C.can be

  D.must be

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• 8— My cat's really fat.— You _____ have given her so much food.

  A.wouldn't

  B.couldn't

  C.shouldn't

  D.mustn't

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• 9Thanks to the immediate rescue, the two boys who had fallen into the river _____ climb onto the bank.

  A.were able to

  B.could

  C.would

  D.should

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• 10— He is supposed to turn up at 6, but… — Here they are. I _____ see their car.

  A.am able to

  B.can

  C.might

  D.should

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