A、Teacher and student. B、Siblings. C、Friends. D、Relatives. C

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!