11. M: I am waiting for my sister to come back and type the application letter for me, the electrics company is going to recruit on campus.

　　W: why bother her. I’ll show you how to use the computer. It’s fairly easy.

　　Q: what does the woman mean?

　　12. M: I’ve been waiting all week for this concert. The performance is said to be excellent and with a student’s discount, the tickets will be really cheap!

　　W: I am sorry, but I have to tell you I lost my Student ID card in the canteen last week.

　　Q: what does the woman imply?

　　13. M: how well are you prepared for your presentation? Your turn comes nest week Wednesday.

　　W: I spent a whole week searching on the net, but end up with nothing valuable.

　　Q: what did the woman say about her presentation?

　　14. W: Mary, we will be boarding soon, are you sure you’ve taken everything necessary?

　　M: let me see…I have the air tickets, our passports and all the documents you need for the upcoming meetings.

　　Q: where are the two speakers?

　　15 W: what’s the difference between a lecture and a lesson?

　　M: Well, both of them are imparting knowledge, but the main difference is that a lesson involves more participation.

　　Q: What does the man mean?

　　16. W: Did your pictures of the night view come out like you expected?

　　M: Actually, I ran out of film before I could even begin. I didn’t realize I’d finished the roll.

　　Q: What do we learn from the conversation?

　　17 W: If the weather is this hot tomorrow we may as well give up the idea of playing tennis in the afternoon.

　　M: Oh, I don’t think it will last long. The weather report says it will cloud over by this afternoon.

　　Q: what does the man mean?

　　18. M: Mary, how are you doing with your thesis?

　　W: I finished my first draft some time ago. But my tutor said I should do more research if I want to got A plus.

　　Q: what do we learn about the woman’s thesis?

　　Conversation one

　　M: Thanks for stopping by, Ann. I'd like to talk to you about a research project I thought you might be interested in. A friend of mine is working at Yellowstone National Park this summer...

　　W: Yellowstone! I've always wanted to spend some time out in Wyoming.

　　M: Wait till you hear what the project is...She's working with the buffalo population. The herds have been increasing in size lately, which is good in theory...

　　W: Yeah...but I thought they were in danger of becoming extinct.

　　M: Well, apparently, because of all the winter tourists, paths are created in the snow. More buffalo are surviving the harsh winters because the paths make it easier for the buffalo to move around and find food. But it turns out that some of the herds are infected with bacteria.

　　W: Oh yeah, I heard about that. Bru—

　　M: Brucella abortus

　　W: Right, It's been around for quite a while.

　　M: Yes it has. And because the buffalo population is increasing, they've been roaming more than usual, and the disease has begun to spread to the cattle ranches that border toe park.

　　W: That's bad news! Isn't that the disease that causes animals to abort their young?

　　M: Yes, and it's caused a lot of controversy. Some of the ranchers even want to destroy the buffalo herds.

　　W: That's awful! Have they made much progress with the research?

　　M: So far, they've been collecting tissue samples from dead buffalo to see if the bacteria's present.

　　W: I'd really be interested in working on this. You know I've been researching dise-　ased animal populations...

　　M: That's why I thought of you...I took the liberty of mentioning your name to my friend. She's hoping you'll be able to spend the whole summer out there.

　　W: Well, I was going to work on my thesis a lot in July, but I'm sure my adviser wouldn't want me to pass up this opportunity.

　　Questions 19 to 21 are based on the conversation you have just heard.

　　Q19. What did the professor want to talk to Ann about?

　　Q20. According to the professor, why is the buffalo population increasing?

　　Q21. Why does the professor think Ann would be interested in going to Yellowstone?