4. In Paragraph 2 the author aims to tell us　.

　　A. friendship has a strong physical effect on people’s health

　　B. we cannot be too careful when making friends

　　C. older people are likely to have fewer friends

　　D. 60 percent of the people without friends will become fat when they get old

　　【解析】选A。段落大意题。根据本段开头(主题句)可知答案。而且主题句后的三个研究结论都与“友谊影响身体健康”有关。

　　B

　　It takes more than just practice to become an Olympian. Gold medal performances require some serious nutrition. Have you ever wondered what these successful athletes eat to stay in peak shape?

　　Keri Glassman, a registered dietitian and founder of Nutritious Life Meals, appeared on“Good Morning America”today to give you a glimpse into the diets ofsome top athletes. Some of their meals could surprise you.

　　Crazy Calorie Count

　　Glassman said Olympians eat a lot of food—quantities that for ordinary people would constitute pigging out. One secret of swimmer Michael Phelps’ astonishing performance in the 2008 Olympics in Beijing was consuming as many as 12, 000 calories in one day.

　　Athletes can eat like this and not gain any weight because their workouts are intense. According to Glassman, Phelps’ workouts can burn 4, 000 to 6, 000 calories in a day, and those calories must be added in order to train the following day.

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