【正确答案】
B
【答案解析】[听力原文]
M: Emm, excuse me, may I ask you a few questions?
W: Yes, what's it for? Is it a marketing survey?
M: No, no, no. It's a survey about study habits. When do you get up every day?
W: Half past six on weekdays, but on weekends, I always get up late.
M: How late?
W: About 11:00 or 12:00. I think I must reward myself for working hard all week.
M: Of course, you've earned it. Do you work best in the mornings or in the afternoons?
W: Well, I guess...in the mornings. I seldom study in the afternoon. You see, my mind is awful then, so I have to take a nap, ...a long nap for 2-3 hours...or...I can't concentrate...
M: I see. Do you often stay up late?
W: Oh, yes, almost everyday. I usually don't go to bed until twelve o'clock.
M: That's funny. Almost everyone in your school says that. Thank you very much.
What is the survey about?