All of the following are possible effects living longer might have on working life EXCEPT

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• 1Which of the following is implied in the sixth paragraph、

  A.Marriages in the US today are quite unstable.

  B.More and more people in the US today want to get married.

  C.Living longer would make it easier for people to maintain their marital ties.

  D.If people live longer ，they would stay in marriage longer.

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• 2Which of the following is NOT mentioned as one of the things that living longer might enable an individual to do、

  A.Spending more time with his family.

  B.Having more education.

  C.Realizing more dreams.

  D.Working longer.

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• 3People sleep less than they used to.

  A.Right

  B.Wrong

  C.Not Mentioned

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• 4Scientists are not sure why we need sleep.

  A.Right

  B.Wrong

  C.Not Mentioned

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• 5Going without sleep is not dangerous for white rats.

  A.Right

  B.Wrong

  C.Not Mentioned

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• 6An important feature of a society in which people live a long life is that

  A.it places more emphasis on educating the young.

  B.it is both wise and energeti

  C.C.it lacks the curiosity to experiment what is new.

  D.it welcomes changes.

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• 7Which of the following best describes Callahan 's attitude to anti-ageing technology 、

  A.Optimistic.

  B.Pessimisti

  C.B.Pessimistic.C.Reserve

  D.D.Negativ

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• 8Before people found stone objects and animal bones in the north of European Russia, some experts thought human beings lived in that area about

  A.30 thousand years ago

  B.20 thousand years ago

  C.28 thousand years ago

  D.15 thousand years ago

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• 9The following statements are true concerning the significance of the finding EXCEPT that

  A.it brings forwards the time in which ancient hunters lived in that area

  B.it provides the evidence of a high level of ancient human society

  C.it showed the unexpected ability of the early humans

  D.it indicates the effect of climate on the movement of early human population

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• 10Which is the most important discovery among the findings

  A.A long elephant tusk.

  B.Ancient stone tools.

  C.123 bones from animals.

  D.mammoth tusk covered with small cuts

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