Had the boy worked harder,he__________the exams.

试卷相关题目

• 1There were already five people in the car but they managed to take me as well . It ______ a comfortable journey .

  A.can't e

  B.shouldn't be

  C.mustn't have been

  D.couldn't have been

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• 2The sun rises in the east and sets in the west，so it seems as if the sun ________ round the earth.

  A.were circling

  B.circles

  C.is circling

  D.be circling

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• 3—Where is Jack?I can't find him anywhere. —He__________ his homework upstairs.

  A.might have done

  B.must have done

  C.must be doing

  D.must do

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• 4They must have been enjoying themselves there,otherwise they _________ so long.

  A.can't have stayed

  B.wouldn't have stayed

  C.needn't have stayed

  D.couldn't stay

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• 5If we throw away too much waste and can't keep good ecosystem,we _________ our future.

  A.must have destroyed

  B.could be destroying 

  C.may be destroying

  D.must destroy 

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• 6The work ______ be finished in such a short time .

  A.wasn't able to

  B.couldn't

  C.ought

  D.could

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