听力原文：W: Excuse me, could I ask you some questions? M: Of course. W: I work for an advertising agency, and I'm doing some research. It's for a new magazine for people like you. M: People like me? What do you mean? W: People between 25 and 35 years old. M: Okay. Right? W: What do you do at the weekend? M: Well, on Friday, my wife always goes to her exercise class, then she visits friends. W: Don' t you go out? M: Not on Fridays. I never go out on Fridays. I stay at home and watch television. W: And on Saturdays? M: On Saturdays, my wife and I always go sailing together. W: Really?. M: Mmm hmm. We love it] We never miss it. And then in the evening we go out. W: Where to? M: Different places. We sometimes go and see friends. We sometimes go to the cinema or a restaurant. But we always go out on Saturday evenings. W: I see. And now, Sunday. What happens on Sunday?. M: Nothing special. We often go for a walk, and I always cook a big Sunday lunch. W: Oh! How often do you do the cooking?. M: Mmm... Twice a week, three times a week. W: Thank you very much. All I need now are your personal details; your name, job, and so on. What's your surname? M: Robertson. The main purpose of the research is ______ A．to make preparations for a new publication B．to learn how couples spend their weekends C．to know how housework is shared D．to investigate what people do at the weekend
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