Question

20．People have long noted the importance of physical activity．It can not only improve your appearance but also help to reduce the risk of some diseases，including heart disease，diabetes and even some kinds of cancer．But many people don't know how to do exercise．
Earlier this year，the Centers for Disease Control released its first ever Physical Activity Guidelines for Americans．To get the most from your exercise plan，experts say adults should get at least two and a half hours of exercise each week．More intense（劇烈的） activities reduce the suggested amount of time to one hour and fifteen minutes．And it doesn't matter whether you exercise for short periods in five days or longer time in two or three days．
Most importantly，experts say people should choose physical activity that they find fun．This helps toguaranteethat they stay with the program．According to them，walking tops the list．More than 79 million Americans walk to stay physically fit．Another popular form of exercise is jogging（慢跑）．Jogging provides great physical conditioning for the heart and lungs．And it increases the flow of blood and oxygen in the body．Swimming is a third most popular sports activity in the United States．Swimming also presents less risk of muscle and joint injury because of the body's weightlessness in water．This makes it a great choice of exercise for people with special needs，like persons who are overweight．Dancing can also be a fun way to exercise．This is especially true for those who see exercise as a necessary evil．（壞事）
Whatever kind of exercise you choose，experts agree that you should start small and work your way up．Start by exercising ten minutes a day two times a week．After a few weeks，increase your time to fifteen or twenty minutes，and increase the number of days．
66．What is the author's purpose in writing the text？（no more than 15 words）To give readers some advice on how to do exercise．
67．Why should people do physical activity according to the first paragraph？（no more than 20 words）
Because physical activity can improve their appearance and help to reduce the risk of some diseases．
68．The underlined word"guarantee"in paragraph 3 probably meansensure/make sure．（no more than 2 words）
69．According to the text，which is the best choice for fat people to do exercise？（no more than 5 words）Swimming
70．What kind of physical activity do you like？Why？（no more than 20 words）（open）I like climbing because it can not only build my body，but also improve my willpower．．

Answer 1

分析 本文主要講述如何鍛煉身體．

解答 66．To give readers some advice on how to do exercise．
 67．Because physical activity can improve their appearance and help to reduce the risk of some diseases．
 68．ensure/make sure
 69．Swimming
 70．（open）I like climbing because it can not only build my body，but also improve my willpower．
66．To give readers some advice on how to do exercise．主旨大意題．  通讀全文可知本文主要講述如何鍛煉身體．
 67．Because physical activity can improve their appearance and help to reduce the risk of some diseases．細(xì)節(jié)題． 根據(jù)文章第一 段It can not only improve your appearance but also help to reduce the risk of some diseases，可知人們鍛煉的原因是鍛煉不僅能改善你的外貌而且?guī)椭鷾p少得疾病的危險(xiǎn)．
 68．ensure/make sure猜測(cè)詞義題．  根據(jù)文章第三 段experts say people should choose physical activity that they find fun． 可知人們應(yīng)該選擇他們喜歡的運(yùn)動(dòng)，因?yàn)檫@可以確保他們堅(jiān)持下去．
 69．Swimming細(xì)節(jié)題． 根據(jù)文章第三 段 This makes it a great choice of exercise for people with special needs，like persons who are overweight．可知游泳對(duì)于特殊需要的人是一個(gè)好的選擇，包括那些肥胖的人．
 70．（open）I like climbing because it can not only build my body，but also improve my willpower．細(xì)節(jié)題． 根據(jù)文章第 三段walking tops the list． 可知好的體育鍛煉方式有散步，慢跑，游泳，跳舞，選其中一項(xiàng)就可以．

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