________ it was very late, ________ he was still doing some experiments in the lab．

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• 1Ann's family ________ for two years ________ they were discovered．

  A.hid away; before

  B.were hiding; before

  C.hid away; as

  D.were hiding; as

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• 2The young man ________ prison for 5 months．

  A.has been put into

  B.has been in

  C.has been cast into

  D.has been thrown into

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• 3________, the orphans(孤儿)are living a happy life．

  A.To take good care of

  B.Taking good care of

  C.Take good care of

  D.Taken good care of

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• 4I was doing my homework last night ________ I heard a cry ________ help．

  A.then; of

  B.while; in

  C.at the same time; to

  D.when; for

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• 5If anyone at work _______ my secret, I'll lose my job．

  A.find out

  B.discovers

  C.will find

  D.will know

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• 6________ you may be right, I can't altogether agree．

  A.While

  B.As

  C.If

  D.Since

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• 7________ on a clear day, far from the city crowds, the mountains give him a sense of peace．

  A.Walked

  B.To walk

  C.Having walked

  D.When he is walking

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