A、Friday. B、Saturday. C、Sunday. D、Any weekday. B从“but we always go out on Saturday evenings”可知B正确。

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 between 25 and 35 years old. What do you do at the weekend?
M: Well, on Fridays my wife always goes to her exercises class, and 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. 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: Um, 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.
Questions 16-20 are based on the conversation you have just heard.
16. What is the main purpose of the research?
17. What does the man do on Fridays?
18. On which day does the couple always go out?
19. Which personal detail does the man give?
20. What is the couple’s favorite sport?