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问题详情：

Sitting for more than three hours a day can decrease a person’s life expectancy(预期寿命) by two years, even if he or she is physically active and gets rid of dangerous habits like smoking, according to a study. Watching TV for more than two hours a day can worsen that problem, decreasing life expectancy by another 1.4 years.

The analysis(分析) comes just two years after Australian researchers found that people who said they watched TV for more than four hours a day were 46% more likely to die of any cause than people who said they spent less than two hours a day watching TV. Those watching TV more than four hours a day were also 80% more likely to die of cardiovascular(心血管的) disease. “Sedentary(久坐的) behavior is something we need to pay attention to, beyond telling people to get 30 minutes of activity a day,” said Peter T. Katzmarzyk, one of the lead researchers. But while the evidence of illness is increasing, it remains difficult for many people to find time to get on their feet, especially if they do desk jobs.

Dr. Katzmarzyk said, “Try to stand as much as you can. Instead of emailing someone in the office, just get up and go to talk to them.” However, he added, standing shouldn’t be an alternative to exercising, but an alternative to sitting. “Several studies show that when you’re sitting, your leg muscles are completely inactive, this is when you run into trouble managing blood glucose(血糖).”

32. What is the main idea of the first paragraph?

A. Watching TV too long can worsen our mental health.

B. We should be active and give up smoking.

C. Sitting for too long a day can shorten one’s life.

D. Smoking too much can be harmful to health.

33. What does Dr. Katzmarzyk think of sedentary behavior?

A. It warns people to exercise 30 minutes a day.

B. It’s a bad behavior worth considering seriously.

C. It can lead to death at once.

D. It is good for desk job workers.

34. According to Dr. Katzmarzyk, if you are sitting all the time, you may _________.

A. phone your friends and talk about your problem

B. put on weight quickly and become more inactive

C. want to have more sugar for your meals

D. find it hard to keep your blood glucose proper.

35. The researchers draw the conclusion (得出结论) on the effect of sedentary behavior by ______.

A. listing figures (数据)               B. doing judging

C. giving examples                       D. classifying (分类) facts

【回答】

CBDA

知识点：阅读理解

题型：阅读理解