阅读理解 As people continue to grow and age our body systems(系统)continue to change．At a certain point in your life your body system will begin to weaken．Your strength may bee weaker．It may bee more difficult for you to see and hear．The slow change of aging causes our bodies to lose some of their ability to bounce back from disease and injury．In order to live longer we have always tried to slow or stop this change that leads us toward the end of our lives． Many factors(因素)decide your health．A good diet plays an important role．The amount and type of exercise you get is another factor．Your living condition is yet another．But scientists studying aging problem want to know：Why do people grow old?They hope that by studying the aging medical science they may be able to make the length of life longer． There is nothing to be afraid of as old age es．Many consider the later part of life to be the best time for living．Physical activity may bee less but often you get better understanding of yourself and the world． What we consider old age now may only be middle-aged some day soon．Who knows with so many advances in medical science happening so quickly life length may one day be measured in centuries rather than in years! (1) When people bee aging they will lose some of their ability to bounce back from dis ease and injury “bounce back”here means ． [ ] A．to escape from disease and injury B．to improve one's health after one's disease and injury C．to jump backward D．to run fast (2) In order to live longer ． [ ] A．we have to try to improve our food B．we should try to do more exercise C．we should slow down the change of aging D．we should keep in high spirits (3) Many consider the later part of life to be the best time of living because ． [ ] A．they consider their life has been a successful one B．they have e through the battle of life safely C．they have less misunderstanding of themselves and the outside world D．they have nothing to do all day long only to watch their grandchildren growing up around them (4) It may be inferred from the passage that our life length may bee ． [ ] A．longer B．shorter C．no change D．the passage didn't mention
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【答案】 答案：1．B;2．C;3．C;4．A;
解析：
(1)
此题用排除法较易做．
(2)
短文第一段的最后一句话作为提示．
(3)
第三段最后一句话．
(4)
第四段最后一句话．