听力原文：M: Hello, Mary. Fancy meeting you here! W: Hi, Peter. Yes, Im here again, there

always seems to be a queue. Im writing a report for my economics class. How about you？ M: Im still working on my essay on environmental science. I need to check out a reference. W: You know, when I first started doing my report I was frightened to use these computer catalogues. I feared something would go wrong. M: But theyre so useful. You can see at a glance what books you need and if theyre checked out or not. W: I know that now, but at the beginning I really missed the card catalogues. But anyway I still have the same problem I used to have, knowing what to look up! M: Yes, I agree, its the same for me. Last week I must have wasted two hours looking for information on a topic I was working on. W: Really？ What was the topic？ M: It was about the effect of smoking by parents on their childrens sleep. I looked up sleeping, child psychology, child development, problems in social work, childrens medical problems, and I cant remember what else. In the end, I had to go back and ask my tutor for help. W: You know, I took a study skills class because I thought it would help me locate information, and all I learned was how to read the cards, which wasnt of much help! My real problem is knowing what card to look up. M: Yes, and that takes thinking! Pity the computer cant do that for us. W: Maybe it will some day. Oh, look, theres a free computer now. M: Yes, thanks. See you! Questions 13 to 15 are based on the conversation you have just heard. 13. What is the mans purpose to come here？ 14. What can we learn from the conversation？ 15. What is the man going to do soon？14．

A．The computer doesn"t work properly.

B．Peter is writing an essay on environment.

C．Mary is much better than Peter in using computers.

D．Peter is taking a computer class which is helpful.