题目内容：

    Do you like running, biking or swimming? They are all forms of aerobic exercise（有氧运动）.Aerobic exercise has lots of benefits（益处）.For example, people who often get aerobic exercise normally live three to four years longer than those who do not.

Nowadays, people get less aerobic exercise than ever before. One of the problems is television. In the United States, for example, the average（普通的）person watches four hours of TV a day, but only spends 27 minutes doing physical activities!A lot of doctors are worried about that and they say people who do not exercise are more likely to be tired, unhappy or sick.

Schools are trying to solve this problem by teaching kids to exercise when they are young. P. E. is a subject that is required in schools. It teaches students how to play, eat and exercise properly. Through the subject, teachers and parents hope that their kids can learn good exercise habits when they are young, and continue them when they get older.

Aerobic exercise is now being promoted at work. A lot of companies have found that people are more quick—minded and creative in their jobs if they often get aerobic exercise. For this reason, many companies are now organizing sports programs, providing exercise rooms, etc.

How do you exercise? There are many fun and exciting forms of aerobic exercise. Finding one that you like will give you the best chance of having a long and healthy life.

1.What do we know from Paragraph 2?

A.Americans watch too much TV.

B.Americans have too much pressure.

C.Doctors are more likely to feel tired and unhappy.

D.27 minutes on physical activities a day keeps people healthy.

2.Teachers and parents hope that P. E.can help kids develop __________.

A.perfect sports skills B.healthy eating habits

C.good exercise habits D.different hobbies and interests

3.The underlined word "promoted" in Paragraph 4 means“ __________” in Chinese.

A.模仿 B.推广 C.改良 D.取缔

4.What's the purpose of the writer to write this passage?

A.To explain what aerobic exercise is. B.To show recent researches on aerobic exercise.

C.To compare different forms of aerobic exercise. D.To encourage people to do more aerobic exercise.