单项选择题
It is believed that climbing can build up the body. When it comes to some skills of climbing, mountain climbing will be the first choice for most people. Now many Americans are learning how to climb in gyms. Here, people can learn and practice on specially designed climbing walls. The climbing wall is vertical and has small holding places for hands and feet.
How do people climb the wall In order to climb, you need a pair of special shoes and a harness (保护带)around your chest to hold you. Ropes are tied to your harness, which hold you in place so that you don’t fall. There are small pieces of metal that protrude for you to stand on and hold on to. Sometimes it’s easy for one to see the new piece of metal, and sometimes it’s not. The most difficult section in climbing is probably to control your sense of fear. It’s normal for one to be afraid of falling, so it’s natural that you feel fear. But just remember when you move away from the wall, the harness and ropes around your body hold you. Consider this and you may begin to feel safe. You move slowly until you reach the top.
Climbing attracts people from all walks of life because it is not only good exercise, but also filled with competitiveness and entertainment (活动娱乐). You use your whole body, especially your arms and legs. So this sport gives a complete workout to your body. When you are climbing, both your mind and body become stronger. More importantly, it strengthens your perseverance and tenacity.
A. To tell people how to climb.
B. To show the equipment for climbing.
C. To encourage people to do exercise.
D. To introduce the sport of wall climbing.