John, can't you be careful? You have _____ some figures in your calculations.

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• 1He spends all his spare time collecting stamps. He seems to _____ this.

  A.be crazy about

  B.be concerned about

  C.be native to

  D.play a part in

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• 2He was _____ by his colleagues though he himself didn't think he had done anything special.

  A.thought little of

  B.thought poorly

  C.thought highly of

  D.thought highly

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• 3Whatever we do should _____ the environment.

  A.contribute for protecting

  B.contribute to protect

  C.contribute to protecting

  D.contribute in protect

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• 4The custom ,______ as early as the Tang Dynasty, has a history of over 1,000 years.

  A.dating from

  B.dated from

  C.to date back

  D.dated back

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• 5— 'Please explain why you're so late.' the boss said angrily.— 'What did the boss say to me?' — 'He ______.' 

  A.orders you to explain why you are so late.

  B.ordered you to explain why were you so late.

  C.asked you to explain why were you so late.

  D.ordered you to explain why you were so late

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