The police still   haven't found the lost child, but they're doing all they  ____.     

试卷相关题目

• 1—Tom is never late for work. Why is he absent today?   —Something _____ to him.

  A.must happen

  B.should have happened

  C.could have happened

  D.must have happened

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• 2—These grapes look really beautiful.—They ______ ! See the price, $ 3.99 a pound. Too expensive, aren't they?

  A.would

  B.could

  C.might

  D.should

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• 3At a construction site in our city the workers have uncovered an ancient wall that_______ to keep the enemy out of the city, but it requires further evidence.

  A.might have functioned

  B.would have functioned

  C.must have functioned

  D.should have functioned

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• 4If you won't do as I tell you, you _____ go to the dance.

  A.won't

  B.shan't

  C.shouldn't

  D.mustn't

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• 5Lifting off at sunrise, the hot air balloon goes wherever the wind _____ blow.

  A.may

  B.must

  C.need

  D.should

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• 6If you _____   smoke, please go outside.      

  A.can

  B.should

  C.must

  D.may

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• 7— Will my son be all right soon, doctor? — Well, he _____ be, if he takes these tablets.

  A.may

  B.must

  C.should

  D.can

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• 8I'm sorry I didn't hear you clearly. _____ you repeat that, please?

  A.Could

  B.May

  C.Must

  D.Need

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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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• 10This cake is very sweet. You _____ a lot of sugar in it.

  A.should put

  B.could have put

  C.might put

  D.must have put

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