Do you like exercising all the time? How often do you exercise? If your answer is "At least an hour every day", it's good for you and you must be healthy.
Most people exercise more than ten hours a week all around us. They keep healthy by exercising. They go to work by bike or on foot instead of by bus. They go for a run outside and breathe the fresh air. It's good for people's health to do that.
Unluckily, some students never exercise because of many reasons. Some of them say they don't have time to exercise. They have to spend their time studying or doing homework. Others say they just don't like it. They often watch TV or play computer games. Watching TV programmes and playing computer games take up most of their time. Some students spend even all of their free time.
Now more and more students are paying more attention to taking exercise. And they have realised that exercise can make them confident and strong. Besides, it can improve their memory and it is more helpful for learning. In a word, students are having a healthier life.
()46. How long do most people exercise a day to keep healthy?
A. About half an hour.
B. More than ten hours.
C. More than an hour.
D. About seven hours.
()47. What does the underlined word "that" refer to in Paragraph 2?
A. Keeping healthy.
B. Going to work by bus.
C. Running and breathing the fresh air.
D. Spending time in doing homework.
()48. Why don't some students do exercise?
a. They don't have time to exercise.
b. They are too lazy to exercise.
c. They don't like it at all.
d. They think they are healthy enough.
A. ab
B. ac
C. bd
D. ad
()49. Which of the following is right according to the passage?
A. Most people like to go to work by bus.
B. Fewer and fewer teenagers know the importance of exercise.
C. Exercise can help students make more progress.
D. It is not useful for teenagers to exercise.
D

46.C 解析:细节理解题。根据第二段首句“Most people exercise more than ten hours a week all around us.”可知,我们周围的大多数人每周锻炼超过 10 个小时,也就是大多数人一天运动超过 1 小时。故选 C。
47.C 解析:代词指代题。根据第二段中的“They go for a run outside and breathe the fresh air. It's good for people's health to do that.”可知,他们出去跑步,呼吸新鲜空气。这样做对人们的健康有好处。所以此处 that 指的是“出去跑步,呼吸新鲜空气”。故选 C。
48.B 解析:细节理解题。根据第三段中的“Some of them say they don't have time to exercise.”和“Others say they just don't like it.”可知,一些学生不锻炼,一部分是因为没时间,一部分是因为不喜欢锻炼。故选 B。
49.C 解析:推理判断题。根据第四段中的“Besides, it can improve their memory and it is more helpful for learning.”可知,锻炼可以提高记忆力,对学习更有帮助,也就是可以帮助学生取得更多的进步。故选 C。