听力原文:M: Mum, what will we have for dinner? W: Maybe fish and chicken soup. What do you want to eat? M: Why don't we eat out? W: That's a good idea. Actually I'm very tired today. M: What about KFC this time? W: OK, then, you'll drive, won't you? M: No problem. … M: Mum, here we are. What would you like to have? I'd like a hamburger. W: I want one, too. And some desserts and beverages? M: Yeah, a glass of Pepsi, an ice-cream cone and an apple pie. W: OK, you go and find the seats first. Why did the mother agree to go out for dinner?