四、阅读理解。（共10小题；每小题2分，满分20分）
A
Today, most people are very busy because of long hours' work, so fast food becomes their first choice most of the time. These might be the food with high calorie and sugar, like hamburgers, fried food and soft drinks. We also see them as junk food.
Our bodies will make a special chemical(化学物质) when we eat junk food. It can make us feel good. But it doesn't go long. About an hour later, we feel tired and hungry again. Some people solve(解决) this by having more junk food. Same things will happen the next day and never end. These eating habits can bring serious health problems. We may start having problems with our sleep. And we may not remember things well. Doctors tell us to eat less junk food. However, when we feel bad, it's easy to forget doctors' advice.
Changing our habits is difficult, but we can try it. If we want some chocolate, have a little. Choose black one—it has less sugar. If you usually go to fast food restaurants, cook the week's meals on weekends instead and keep them in your fridge. Then, even if you are busy, you can still have a healthy meal.
()31. What's the meaning of the underlined word “choice” in Chinese?
A. 习惯 B. 爱好
C. 选择 D. 订单
()32. The underlined word “it” refers(提及) to .
A. the chemical B. the junk food
C. the soft drink D. the body
()33. What problem may junk food bring for us?
A. We can't run fast. B. We can't walk.
C. We can't sleep well. D. We can't drive.
()34. From Paragraph 3 we can learn .
A. we can never change our eating habits
B. we can change our habits from small things
C. we should ask doctors for help
D. we should stop eating junk food right now
()35. Which of the following is TRUE according(根据) to the passage?
A. People like to have fast food because they are lazy.
B. It's not easy to remember things if we usually eat junk food.
C. Doctors' advice is always easy to remember.
D. People can do sports to keep healthy.

31. C 32. A 33. C 34. B 35. B