Every solid object ______ reflect a sound，varying according to the size and nature of the object．

试卷相关题目

• 1Whenever he worked until midnight, he ______ drink some coffee to get refreshed.

  A.could

  B.should

  C.must

  D.would

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• 2“No student,”the headteacher stressed, “_______ go out of the school after ten o'clock at night without my permission. ”

  A.shall

  B.will

  C.must

  D.may

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• 3How ______ Mike have refused such a good opportunity to go abroad for further study?

  A.need

  B.must

  C.can

  D.might

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• 4I'm impressed with his determination. When he had a problem to solve, he  _____ work at it until he found an answer.

  A.would

  B.might

  C.must

  D.should

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• 5I'm fond of my sister, but she has a serious shortcoming. She _______ be really stubborn.

  A.must

  B.will

  C.can

  D.should

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• 6On rainy days, accidents ______ happen sometimes on steep roads．

  A.should

  B.shall

  C.must

  D.can

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• 7I talked for a long time, and in the end I_____ make her believe me.

  A.should

  B.can

  C.was able to

  D.must

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• 8He ______ away before we arrived, since the house was deserted．

  A.shall have gone

  B.should have gone

  C.could have gone

  D.must have gone

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• 9For the engine to work, the green button _________ be in the “on” position．

  A.can

  B.would

  C.must

  D.might

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• 10As is natural, a man as old as he ________ be very forgetful.

  A.can

  B.must

  C.should

  D.would

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