【正确答案】
C
【答案解析】[听力原文]
W: Wake up, Eric! Time to rise and shine.
M: Ha, oh! Jean, I must have fallen asleep while I was reading.
W: You and every one else. This looks more like a camp-ground than a library.
M: The dorm's too noisy to study in, and I guess this place is too quiet.
W: Have you any luck finding a topic for your paper?
M: No. Professor Grant told us to write about anything in cultural anthropology. For once I wish he hadn't given us so much of choice.
W: Well, why not write about the ancient civilization of Mexico? You seem to be interested in that part of the world.
M: I am. But there is too much material to cover. I'd be writing forever. And Grant only wants five to seven pages.
W: So, then limit it to one region of Mexico, say, the Yubitan. You've been there? And you said it's got a lot of interesting relics.
M: That's not a bad idea. I brought plenty of books and things back with me last summer that would be great resource material. Now if I can remember where I put them.
What was the man doing when the woman approached him?