题目内容：

Sports can help you keep fit and get in touch with nature. However, whether you are on the mountains, in the waves, or on the grassland, you should know that your choice of sport might have great influence on the environment.

Some sports are resource-hungry（消耗资源）. Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of chemicals and huge amounts of energy are used to keep its courses（球场）in good condition. This causes major environmental effects. For example, in the dry regions of Portugal and Spain, golf is often held responsible for serious water shortage in some local areas.

There are many environmentally-friendly sports. Power walking is one of them that you could take up today. You don’t need any special equipment except a good pair of shoes; and you don’t have to worry about resources and your wallet. Simple and free, power walking can also keep you fit. If you walk regularly, it will be good for your heart and bones. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control.

Whatever sport you take up, you can make it greener by using environmentally-friendly equipment and buying products made from recycled materials. But the final goal should be “green gyms(健身房；体育馆)”. They are better replacements（代替物）for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or some other open spaces. There is no special requirement for you to start your membership. And best of all, it’s free.

1.What do we know about golf from the passage?

A. It pollutes the environment with all sorts of chemicals.

B. It needs water and other energy to keep its courses green.

C. It is very popular in Portugal and Spain.

D. It causes water shortages around the world.

2.Which of the following is NOT the advantage of power walking according to the passage?

A. It is environmentally-friendly.    B. It improves our health.

C. It is simple and free.    D. It can make you put on weight.

3.Which sport is the writer most likely to advise us to do?

A. Playing basketball in a gym.    B. Motor racing in the desert.

C. Cycling around a lake.    D. Swimming in a sports center.

4.What is the main purpose of writing the passage?

A. To show us some major outdoors sports.

B. To encourage us to go in for green sports.

C. To discuss the influence of some popular sports

D. To introduce some environmentally-friendly sports.