听力原文：W: John, have you chosen a physical education class yet for this semester? M: No. Why? W: You've got to take rock-climbing. We just had the first class and it looks like it is going to be great. M: You think I should take rock-climbing? You've got to be kidding. Besides, how can they teach rock climbing when it's completely flat around here? W: That's not important. You can't just start climbing without any training. You had to learn how to use the ropes and the belts, there's a lot of preparation first. M: You don't think it's just a little bit dangerous? W: Not if you know how to use the safety equipment the ropes stretch a little, the shoes have special plastic. You have to learn how to use all these before you do any real climbing. M: Well, We'll spend the whole semester studying something we don't actually get to do. W: We will take a climbing trip during spring break. But that's not the point. Climbing is not the only goal. In preparing to climb you learn patience, self-discipline and you gain fantastic physical strength, especially in your hands. For the first few weeks we're going to concentrate entirely on hand and upper body exercise. M: All that in one sport? Maybe you are right. Since it's not too late to join the class, maybe I will. (20)