Now you'll hear the two long conversations.
Conversation One
W: Hi, Kaven. Your roommate told me that I could find you in the TV lounge. What are you doing here?
M: What does it look like I am doing?
W: Well, it looks like you are watching television, [19]but we have a linear algebra mid-term tomorrow, so I thought you'd be studying for it and maybe I can study with you.
M: Oh, well, I was just taking a break. This linear algebra stuff gives me a headache if I work on it too long.
W: I know what you mean. I've been working on it for three hours already. I'm beginning to go cross. I'd been thinking at the sample problems. I just don't get some of them.
M: [20]But I can't believe you are coming to me. I mean you do know what I got on the last test, don't you?
W: Yeah, I know. You told me. I just thought two heads might be better than one.
M: Yeah, that's a nice idea. But... you know, I wish I knew that person in our class who got a hundred on the last test. She didn't miss a question. Umm... was it Elizabeth?
W: Oh yeah, Elizabeth! She is a friend of mine. She'd be a big help right now. Why don't I give her a call?
M: [21]What! At this hour? It's already ten thirty. I don't wanna impose on her.
W: Yeah, I guess you are right. But you know what? She owes me a big favor. Let's at least give her a call and see what she says. Maybe going over some of the problems with us would help her review the material.
M: It's worth a try.

Questions 19 to 21 are based on the conversation you have just heard.
19. What's the woman's purpose of looking for the man?
正确答案：D
解析：选项都是不定式短语，本题可能询问目的。女士说：“我们明天有线性代数期中考试。我想你应该在学习，也许我可以跟你一起学习。”故D正确。
20. Why is the man surprised that the woman wants to study linear algebra with him?
正确答案：D
解析：男士说：“我真不敢相信你居然来找我。我的意思是你应该知道我上次考试的成绩，不是吗？”由此可推断出他上次考得不好，所以D正确。
21. Why doesn't the man want to call Elizabeth?
正确答案：C
解析：根据选项猜测，问题应该和Elizabeth有关，听音时要留意。男士说：“什么？这个时间？已经10:30了。我不想去打扰她了。”故C正确。