听力原文：W: John, this new Walkman is absolutely wonderful. M: Yeah, I like it very much. W: Thank you for lending me this Walkman. M: Don't mention it. W: Where did you buy it? M: Tom and Jane bought it for me for my birthday. W: They are so thoughtful. You are very lucky, John, to have such a nice family. I... M: Is something wrong, Mary? Yes, there is. I can tell. What's the matter? Come on, you can tell me. What's up? W: I don't know. Something's wrong. I just received a letter from my parents this morning. M: Did they write some bad news? Anybody felt sick? Or even worse? Or your grandpa? W: No, no. M: Well, then why are you so sad? W: I miss them. I simply miss them. I miss them very much. M: Eh, I'm sorry, Mary. But I understand. W: You see, the Smiths treat me so nicely, and I love being with your family so much.., but when I received the letter with photographs of my family, I cried. I know I must seem silly. M: Hey, why don't we go out for a cheeseburger and French fries? That']l cheer you up. W: That's a good idea. But if we go out, please don't complain about your math teacher or your math homework. I want to have fun. M: So do I. Wait a moment. I have to turn off the lights, or else my father will get really angry. He says I never turn them out when I leave. If they come home and see all the lights on... Just a minute! (23)