题目内容：

    Some people think riding bicycles isn’t popular. They aren’t interested in it. So less and less people ride bicycles in the city. Nowadays some office workers usually go to work by car. Most students take the bus or the subway to go to school.

But I don’t think so. I think riding bicycles is good for my health. It has many benefits(益处). Firstly, when I am riding a bicycle, my whole body is exercising all the time. It is a good way to keep fit. Usually most office workers are busy with their things and most students are busy with their lessons, so they have no time to do sports. So riding bicycles is a good way to keep healthy for them.

Secondly, riding bicycles does good to our environment(环境). As we know, driving cars can pollute(污染) air. It makes the temperature high day by day. If we go to work by bike, the air will become cleaner than before. We can also save money at the same time. Why not enjoy doing it?

Riding bicycles is good for our health and the environment. We should all ride bicycles.

根据短文内容，选择最佳答案。

1.How do some office workers go to work?

A.By subway. B.By bus. C.By car. D.On foot.

2.The writer thinks riding bicycles ________.

A.is popular B.does good to our health

C.makes the ground cleaner D.save time

3.Riding bicycles is ________ to keep fit for students and office workers.

A.the best way B.a good way C.the only way D.a sport

4.What does the writer want us to do in the third paragraph(段)?

A.To ride bicycles. B.To drive cars. C.To save money. D.To save time.

5.The best title for the passage is ________.

A.How to Ride Bicycles B.Do Exercise

C.How to Keep Fit D.Benefits of Cycling