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

试卷相关题目

• 1He ______ 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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• 2I 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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• 3On rainy days, accidents ______ happen sometimes on steep roads．

  A.should

  B.shall

  C.must

  D.can

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• 4Every solid object ______ reflect a sound，varying according to the size and nature of the object．

  A.must

  B.shall

  C.will

  D.should

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• 5Whenever he worked until midnight, he ______ drink some coffee to get refreshed.

  A.could

  B.should

  C.must

  D.would

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• 6As is natural, a man as old as he ________ be very forgetful.

  A.can

  B.must

  C.should

  D.would

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• 7There ________ an apple tree behind the house.

  A.used to be

  B.use to be

  C.used to

  D.is used to be

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• 8It is usually warm in my hometown in April, but it ________ be rather cold sometimes.

  A.can

  B.must

  C.would

  D.should

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• 9Mike ______have stolen the money from the bank,______he appeared to be rich overnight

  A.can't; for

  B.might; for

  C.must; since

  D.can't; since

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• 10John promised his doctor he ______ not smoke, and he has never smoked ever since.

  A.might

  B.should

  C.could

  D.would

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