According to the school rules, no student _____ go out of the school after nine o'clock at night without the teacher's permission.

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• 1— The woman biologist stayed in Africa studying wild animals for 13 years before she returned. — Oh, dear! She _____ a lot of difficulties!

  A.may go through

  B.might go through

  C.ought to have gone through

  D.must have gone through

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• 2When I was young, I was told that I _____ play with matches.

  A.wouldn't

  B.needn't

  C.mustn't

  D.daren't

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• 3— Mum, I've been studying English since 8 o'clock. _____ I go out and play with Tom for a while? — No, I'm afraid not. Besides, it's raining outside now.

  A.Can't

  B.Wouldn't

  C.May not　　　

  D.Won't

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• 4If the dog hadn't woken us, we wouldn't have noticed the fire and it _____ to the house next door.

  A.could spread

  B.should have spread

  C.would spread

  D.might have spread

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• 5— Did you go to the open-air concert?— No. We ____. but we spent too much time shopping.

  A.could have gone

  B.must have gone

  C.can't have gone

  D.shouldn't have gone

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• 6Students _____ remain in their seats until all the papers have been collected.

  A.may

  B.shall

  C.need

  D.can

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• 7My cell-phone has disappeared. Who ____ have taken it away?

  A.could

  B.should

  C.must

  D.might

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• 8He has no idea what the book is about. He _____ have read it very carefully.

  A.needn't

  B.shouldn't

  C.can't

  D.mustn't

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• 9Please do not feed the fish; they _____ die if they eat too much.

  A.shall

  B.must

  C.need

  D.may

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• 10— ____ I take the book out?   — I'm afraid not.    

  A.Will

  B.May

  C.Must

  D.Need

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