听力原文：M: Hi, Judy, you look happy. W: Yes, I just saw a very funny film on TV. M: What was it about.'? W: It was about a careless man who got into trouble wherever he went. He couldn't do anything well. M: So you liked it? W: Yes, I did. It made me laugh a lot. M: But I would rather see something not only interesting but also instructive. W: Oh, Mike, don't be so serious. People sometimes need relaxation. M: That's true. But I think that watching TV is not just for entertainment. What are these two people talking about?