By referring to rapid economic development as "a favor" at the beginning of the passage, the author means that（）.

[材料题] For the most part, rapid economic development has been a favor. But there is a down side to development -- health problems such as overweight are all becoming more common, as more people take taxis to work instead of riding their bicycles, and other labour-saving devices become more popular. An increasingly fast pace of life makes it difficult for people to spend time playing sports. “I know exercise is good for your health,” a young lady said. “ But after a busy work week, the only thing I want to do is watch some TV and go to sleep.” That attitude may explain the results of a recent nationwide study, which suggested 15 percent of urban adults in China have heart problems. Local researchers found that 31. 2 percent of elderly respondents (受访者) were getting enough exercise, but less than 9 percent of youngsters and the middle-aged got enough physical activity. Elderly people understand the importance of protecting their health. The young people, however, are busy working and use this as an excuse

单项选择题1.By referring to rapid economic development as "a favor" at the beginning of the passage, the author means that（）.: A、it has benefited the general public greatly; B、it has done harm to people's health nationwide; C、it is going faster than anyone could have imagined; D、it has helped to establish a healthy lifestyle. of the public

单项选择题2.Rapid economic development has resulted in all the following EXCEPT（）.: A、an increasing number of taxi passengers; B、the wide use of labour-saving devices; C、an increasing fast pace of life; D、people's awareness of the importance of exercise

单项选择题3.The young people do not have enough exercise because （）.: A、they don't have the time for it; B、they are ignorant of the benefits of exercise; C、they are too weak to participate in physical activity; D、they are short of money

单项选择题4.According to the passage, who need regular exercise most?: A、Only young and middle-aged ladies.; B、Urban adults with full-time jobs.; C、Elderly people suffering from high blood pressure.; D、Local doctors and youngsters.

单项选择题5.What is the main idea of the last paragraph?: A、Many people are still unable to afford the cost of physical exercises.; B、Nobody should take part in physical activity in order to be an athlete.; C、Moderate physical exercise is usually enough for ordinary people.; D、Old or sick people should only take part in physical exercises of the slowest type.

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