听力原文：W: Have you been to the new sports centre yet? M: I certainly have. I joined the fitness club on Monday and I met another squash player there. We're going for a game this evening. W: I signed up for the aerobics class, but I haven't checked out their other facilities yet. M: Go to their fruit juice bar. They do snacks too. The staff there are really friendly and you can meet the other people who go to the sports centre. W: Which snacks do you recommend? I suppose they must be really healthy-not the kind of food I usually see you eating! M: That's true. I like the carrot cake best. By the way, they offer tennis classes at the centre. Didn't you say you were interested in learning? W: Yes, I did. Are they expensive? M: They're cheaper than I've seen anywhere else, mainly because they teach you in small groups, not individually. You can get individual coaching if you prefer. W: I'm happy with a small group. I mean, I want to learn just to play for fun, not in any competitions or anything. M: Why don't we go there together now, unless you've got something else on? We can have a little look around and you can buy me a nice healthy snack. W: Well, I am free as it happens, but why should I buy you a nice healthy snack? M: You did say last week that you thought I should try to eat a little more healthily. (20)