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 be aware that your sport of choice might have great influence on the environment.
Some sports are resource-hungry．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 environment-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 purse．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 environment-friendly equipment and buying products made from recycled materials．But the final goal should be “green gyms”．They are better replacements for traditional health clubs and modern sports centers．Members of green gyms play sports outdoors, in the countryside or other open spaces．There is no special requirement for you to start your membership．And best of all, it’s free.
The author thinks the golf is resource-hungry because of the following EXCEPT that ________.

A．Golf wastes large areas of countryside

B．Golf runs out of much water

C．Golf is bad for people’s health

D．Keeping golf court in good condition needs too much energy

According to the passage, which of the following is an environment-friendly sport?

A．hiking in the hills	B．swimming in the pool
C．playing basketball in the gym	D．motor racing in the desert

The reason why the author uses power walking as an example mainly is that ________.

A．it improves our health	B．it is an outdoor sport
C．it is recommended by experts	D．it uses fewer resources

The passage is developed mainly by ________.

A．examples and explanation	B．comparison and persuasion
C．facts and descriptions	D．figures and conclusion