6．One of the most widely accepted assumptions （假設(shè)） in our culture is that if you exercise，youwill lose weight．I exercise all the time，but I still have got fat．Why doesthis happen？
    More than 45 million Americans now belongto a health club，up from 23 million in 1993．We spend some $19 billion a yearon sports．Of course，some people join the health club but never go．Still，asone main study-the Minnesota Heart Survey-found，more of us at least say weexercise regularly．
    However，the number of fat people has risengreatly：a third of Americans are fat，and another third count as overweight．Yes，it's highly possible that those of us who regularly go to the sportscenter would weigh even more if we exercised less．But like many other people，I get hungry after I exercise，so I often eat more on the days I exercise thanon the days I don't．Could exercise actually be keeping me from losing weight？
    People believe that exercise is importantfor weight control is actually rather new．Doctors used to advise not toexercise too much，particularly for older adults who might hurt themselves．Today doctors encourage even their oldest patients to exercise because peoplewho regularly exercise are at a lower risk for most illness，especially heartproblems．They less often develop cancer and many other illnesses，but the roleof exercise in weight loss has been completely overestimated （評估過高）．
"In general，for weight loss，exercise ispretty useless，"says an exercise researcher．

31．From thepassage we learn thatA．
A．some Americans join a health club but never go there  
B．the number of overweight people has doubled since 1993
C．more than 45 million Americans now go to the sports center regularly
D．Americans waste too much money each year on sports
32．According tothe writer，people might put on weight becauseD．
A．they have the habit of going to the health club regularly
B．they eat the same food when they do not exercise
C．they exercise less than required by doctors
D．they eat more after they exercise
33．What may be thebest title for this passage？B
A．Overweight Is Not Good for Your Health  
B．Exercise Won't Make You Thin 
C．Health Club Is Part of American Lifestyle           
D．Fatness Is a Social Problem in America．

分析 通常我們認為，經(jīng)常鍛煉就可以減肥．但是研究證明，鍛煉對于減肥來說收效甚微，卻可以預(yù)防很多疾病，讓人們身體健康．

解答 31．A  細節(jié)理解題  根據(jù)"some people join the health club but never go"可知，很多人加入俱樂部，但是卻不去，故A正確；根據(jù)"More than 45 million Americans now belongto a health club，up from 23 million in 1993．"可知，是加入俱樂部的人數(shù)加倍，而不是超重的人數(shù)，故B錯誤；根據(jù)"some people join the health club but never go"可知，很多人沒有去俱樂部，故C錯誤；根據(jù)"We spend some $19 billion a yearon sports"可知，文中并未提及浪費了很多錢，故D錯誤．故答案為A
32．D  細節(jié)理解題  根據(jù)"I get hungry after I exercise，so I often eat more on the days I exercise thanon the days I don't．Could exercise actually be keeping me from losing weight？"可知，人們不能減肥是因為鍛煉后又吃了很多．故答案為D
33．B  推理判斷題  根據(jù)短文大意可知，但是研究證明，鍛煉對于減肥來說收效甚微，故答案為 B 鍛煉不能讓你變瘦．

點評 做這道題時要先通讀全文，弄清短文大意，然后根據(jù)相關(guān)句子選出正確答案，最后仔細檢查．

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