听力原文：W: Hi Stan, where have you been？
M: Oh, just at the Student Union office trying to see if I can catch you there. I also tried to find out if professor Steinfield has any old exams from years ago.
W: Why don't you just ask me？ I took that class last semester and aced it.
M: Yeah... you ace all your subjects. But the exams change from year to year, don't they？
W: True, but the style. is pretty much the same from year to year.
M: So tell me all about the process of prostaglandin. I can barely even pronounce it, let alone explain it.
W: Hey, I am no expert but what she'll be mainly looking for is that you know how it affect the digestion, reproduction, and immune systems.
M: What kinds of questions might she ask？
W: Well, for example, you'll probably have to say how prostaglandin, if over-produced can give you headaches and fevers and stuff.
M: Talk about headaches. I think I'm getting one now. Can you give me an aspirin？
W: Well, it's probably because you have too much prostaglandin. Aspirin blocks prostaglandin production.
M: Well, I'm sure it's this Biology class that's doing it.
W: Hey, I've heard you're no slouch at poetry. You get me through my course in 19th century poetry and I'll make you an expert in Biology.
M: It's a deal. Where shall we begin？ Poetry is up my alley.
(20)

A. To look for an aspirin for his headache.
B. To find professor Steinfield.
C. To look for past tests papers.
D. To look for the woman.