听力原文：M: Hey, Amy, where are you off to? W: To the Recreation Center. I've got a physical education class. M: What course are you taking? W: Fencing. M: Oh, really? Is it hard? W: I was in the fencing club in high school, so for me it's mostly review. M: I once heard someone call fencing 'the thinking person's sport.' Would you agree with that? W: It does require lots of concentration, and if you want to win matches, tactics are important — just like in a game of chess. M: And I suppose you have to be fast and strong to win. W: Speed is important, and agility, but you don't have to be particularly strong to be a good fencer. The main reason I like fencing, though, is that it's great exercise. I find an hour of fencing is as good a workout workout as, as say, an hour of tennis. (20)