【答案解析】[听力原文]16-18 M: Good morning! Can I help you, Madam? W: Good morning! I'm looking for a coat. M: What color would you like? W: Could you show me some? I'd like a middle-sized red coat. M: Sorry. We haven't anything of your size. W: Do you have a smaller size? M: I'm sorry. The small size coats have just been sold out. How about the blue one? It looks nice and perhaps fits you. W: Well, may I try it on? M: Yes, please. W: It seems nice on me. How much is it? M: 168 yuan. W: OK. Here is 170 yuan, please. M: Your change, please. Thank you. W: You may keep the change. Good-bye. M: Thank you ! Good-bye !