听力原文：M: You look happy. Did you sell lots of things at the store today? W: No. I bought something. It was a great deal. M: So what is it? W: A laptop computer. M: Really? That's great. They are really convenient. You can take them anywhere. W: You are right. That's what I thought. I can use the computer at home and at my store. M: What will you use it for at the store? W: To keep track of all the things in the store. How much I sell them for and which article sells best, and what are the things in sufficient stock. M: That's a good idea. But I didn't think you knew how to use a computer. W: I have to say I don't. M: Then why did you buy one? W: I've heard so much about computers. And I've heard you can find so many interesting things online. I was walking past the computer store downtown. I saw they had computers on sale. M: So you went into the store to ask a few questions. W: That's right. And I met a nice, young salesman. He showed me lots of things a computer can do. I just had to buy one. M: So now who is going to teach you to use it? W: You are. (20)