根据下列材料，回答题。WalkingtoExercisetheBrainDoyouthinksittingandstudyingallthetimew

共享题干题根据下列材料，回答题。 Walking to Exercise the Brain Do you think sitting and studying all the time will improve your grades?Think again． Getting some exercise may help，too． New research with older people suggests that taking regular walks helps them pay attention better than if they didn’t exercise． Previous research had shown that mice learn，remember，and pay attention better after a few weeks of working out on a running wheel．Mice that exercise have greater blood flow to the brain than those who don’t．Their brain cells also make more connections． Neuroscientists from the University at Urbana—-Champaign wanted to find out if the same thing is true for people．First，they measured the physical fitness of 41 adults，ages 58 to 77， after each person walked 1 mile．Then，participants looked at arrows on a computer screen and had to use computer keys to show which way one particular arrow was pointing． Adults who were physically fit were faster at the arrow task，and their answers were just as ac curate as their less—fit peers．the researchers founD、The fitter participants also had more blood flow to a part of their brain responsible for paying attention and making decisions． In a second study，15 elderly people who completed a 6-month aerobic-training course were faster at attention tasks compared with 14 seniors who just did stretching and toning exercises for the same amount of time． So，even going for a walk every 2 or 3 days for just 10 to 45 minutes can help．That should be good news for your grandparents． The effects of exercising on the brains of younger people haven’t been studied yet．Still，it can’t hurt to take occasional study breaks and go for a walk or run around with your friends．You might even do better in school． Whatever you do，though，don’t try to read and walk at the same time．You could end up hurting yourself!1.[不定向选择题]Walking regularly helps elderly people______．A.lose weight B.become happier C.concentrate better D.look younger 2.[不定向选择题]It can be good for health when one takes a walk every 2 0r 3 days for at least______A.3 minute B.45 minute C.30 minute D.10 minute

1.参考答案：C
参考解析：题干：定期散步有助于老人——。?A、减肥 B、变得更高兴C、更好地集中注意力 D、看上去年轻一些?细节题。利用regular walking可以定位到第二段“New research with older people suggests that taking regular walks helps them pay attention better than if they didn’t exercise”，意为“对老年人的新研究显示经常运动能让老年人更集中精力”，因此答案为C“更好地集中注意力”。[考点延伸]本题考查词汇替换：pay attention better替换成了选项中的concentrate beaer。阅读理解题中最常见的对原文信息的改写方式有两种：句式改写和词汇替换。concentrate后的介词为on。
2.参考答案：D
参考解析：题干：一个人每2—3天散一次步，每次至少——，这对健康有好处。A、3分钟 B、45分钟 C、30分钟 D、10分钟细节题。利用题干关键词可以定位到原文第七段“因此每两到三天就出去散步10到45分钟都会对健康有益”因此只能选D。[考点延伸]every后面加上数字，意思是“每……”。?3.[不定向选择题]It is suggested in the last paragraph that people should______．A.run around once a week B.not read and walk at the same time C.go for a walk every day D.not hurt their friends while exercising

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