（2007天津﹚It is difficult for us to learn a lesson in life ______ we’ve actually had that lesson.

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• 1（2007天津﹚ ______ fire, all exits must be kept clear.

  A.In place of

  B.Instead of

  C.In case of

  D.In spite of

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• 2（2007上海﹚The traditional view is ______ we sleep because our brain is “programmed” to make us do so.

  A.when

  B.why

  C.whether

  D.that

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• 3（2007上海﹚Small sailboats can easily turn over  in the water  ______ they are not managed carefully.

  A.though

  B.before

  C.until

  D.if

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• 4（2007上海﹚Leaves are found on all kinds of trees, but they differ greatly ______ size and shape.

  A.on

  B.from

  C.by

  D.in

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• 5（2007上海﹚______ he referred to in his article was unknown to the general reader.

  A.That

  B.What

  C.Whether

  D.Where

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• 6（2007安徽﹚The field research will take Joan and Paul about five months; it will be a long time _____we meet them again.

  A.after

  B.before

  C.since

  D.when

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• 7（2007湖北﹚People try to avoid public transportation delays by using their own cars, and this ______ creates further problems.

  A.in short

  B.in case

  C.in doubt

  D.in turn

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• 8（2007江西﹚Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.

  A.of; at

  B.by; in

  C.of; on

  D.on; at

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• 9（2007江西﹚He was told that it would be at least three more months ______ he could recover and return to work.

  A.when

  B.before

  C.since

  D.that

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• 10（2007湖南﹚ ______ the silence of the pauses, we could hear each other’s breathing and could almost hear our own heartbeats.

  A.In

  B.For

  C.Under

  D.Between

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