第6题: [单项选择]The writer regards physical exercise as a strong medicine because ______. A. the WHO holds the view B. it helps improve the quality of life C. the lack of it equals serious illness D. it enables people to live longer 参考答案:B 答案解析:本题是原文重现题,我们可以在第一段的第一句中找到相应的对照:Declaring that physical exercise is one of the most powerful medicines