All of the following are possible effects living longer might have on working life EXCEPT______.
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1 .According to the passage, the incidence of cancer is generally believed_______.
A to be based on inactive life style B to be due to anxiety C to result from environmental influences D to be caused by heavy smoking
2 .It can be inferred from the passage that the writer’s opinion about the relationship between cancer and environment is _______.
A positive B negative C neutral D approving
3 .According to the passage, the writer seems to feel that _______.
A cancer risk is on the rise B the whole earth resembles a huge carcinogen. C the risk of catching cancer is not so great as most people conceive. D cancer can be cured sooner or later.
4 .Which of the followings would be the best summary of the passage?
A cancer and environment B the fear caused by cancers C data on cancer incidents D cancer and its investigations.
5 .Which 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.
7 .An 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 energetic. C it lacks the curiosity to experiment what is new. D it welcomes changes.
8 .Which of the following best describes Callahan 's attitude to anti-ageing technology?
A Optimistic. B Pessimistic. C Reserved. D Negative.
9 .People used to think that______.
A children and adolescents are sensitive to phone emissions B cellular-phone use cannot cause brain tumors C children and adolescents shouldn’t use cellular-phone in school D cellphone emissions can penetrate deeper into children brains
10 .Which of the following statements is true according to the third paragraph?
A More and more children in developing country begin to use cellphone B Cellphone usage causes more brain tumors among children C The risk of cellphones causing brain tumors in children can be excluded D Outer brain tissue of adult cannot absorb cellphone energy
