A、Science. B、Chemistry. C、Geography. D、Biology. D细节题。女士以为男士是学化学专业的，但男士给予否定，并指出他是学生物专业的(Biology)，故答案为[D]。

M: Hi, Denise!
W: Hi, Andrew. It’s nice to see you again!
M: Where are you going now?
W: I’m going to chemistry class right now. It starts at 4 o’clock, so I still have 20 minutes to walk there.
M: Oh, I’m going in the same direction. Shall we go together?
W: Yeah, great.
M: Where is your class?
W: It’s on the third floor of the Science Building.
M: The Science Building? That is very close to here. How is that class?
W: Well, it’s okay. The book is a little hard for me, but the professor is great, so it’s okay.
M: Who teaches that class?
W: Professor Smith. Have you seen his classroom?
M: No, I haven’t. Why do you ask that?
W: He decorates the entire classroom like a chemistry museum.
M: That sounds very interesting.
W: What about you? Are you taking chemistry this term?
M: Yes, I am. I have classes on Tuesday, Thursday, and Friday from 10: 00 am to 11: 00 am.
W: That’s right. Chemistry is your major.
M: No, chemistry is not my major. Biology is. But I still have to take chemistry.
W: How do you like that class?
M: Well, I find the textbook a little difficult, but I am getting by.
W: Do you like your professor?
M: I have mixed feelings about Professor Davis.
W: Really? Why?
M: Well, he’s a great teacher, but he gives us so much homework. We have to complete 20 pages of homework by next week.
W: 20 pages! It’s far too much.
M: Oh, it’s ridiculous.
W: Andrew, I’d better get going to class.
M: Okay. Well, I’ll see you later then.
W: Bye.
22. What’s the time when the two speakers meet?
23. Which of the following statements is true about the woman’s chemistry classroom?
24. What is the man’s major?
25. What can we learn about Professor Davis from the man’s remarks?