银川一中高三年级第五次月考英语试卷(4)
作者:佚名 发布时间:2018-06-29 11:36:46 本文来源于:莲山课件
  C

  Your chair is your enemy.

  It doesn’t matter if you go running every morning, or you’re a regular at the gym. If you spend most of the rest of the day sitting, you are putting yourself at increased chance of heart disease, cancers and an early death. In other words, even if you exercise energetically, sitting for long periods is bad for you.

  So what’s wrong with sitting? One is that sitting is one of the most passive things you can do. You burn more energy by chewing gum than you do sitting still in a chair. Compared to sitting, standing in one place is hard work. To stand, you have to tense your leg muscles, and the muscles of your back and shoulders. While standing, you often change from leg to leg. All of this burns energy.

  For many people, weight gain is a matter of slow increase. Thus, a little more time on your feet today and tomorrow can easily make the difference between remaining thin and getting fat. So part of the problem with sitting a lot is that you don’t use as much energy as those who spend more time on their feet. This makes it easier to gain weight, and makes you more likely to suffer from the health problems that fatness often brings.

  Some people have advanced solutions: replace your sit-down desk with a stand-up desk. Make sure that your television can only operate if you are practicing on an exercise bike. Replace your office chair with a therapy(治疗) ball: this too uses more muscles, and more energy, than a normal chair, because you have to support your back and work to keep balanced. But whatever you choose, know this. It is clear: be careful of your chair.

  28. The main purpose of writing this passage is to __________.

  A. suggest sitting less.

  B. advise exercising often.

  C. avoid gaining weight.

  D. escape standing more.

  29. From this passage, we know that _________.

  A. standing burns nearly as much energy as sitting still does.

  B. taking exercise regularly but sitting more will do good.

  C. less exercise will reduce the chance of having disease.

  D. energy-burning activities will help you enjoy good health.

  30. The underlined word “This” in Paragraph 4 refers to __________.

  A. gaining weight. B. burning energy.

  C. sitting too much. D. standing more.

  31. A therapy ball is mentioned in the last paragraph to _________.

  A. tell us to walk while working in the office.

  B. suggest a way to settle the sitting problem.

  C. support our back and keep us balanced.

  D. provide a better cure for our backache.

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