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: Ok. W: Right. Urn, what do you do at the weekend? M: Well, on Fridays, 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: Mm, 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 restaurants. But we always go out on Saturday evenings. W: I see. And now Sunday. What happens on Sundays? 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: Urn, 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: Robinson. What is the main purpose of the research?