A、Mechanic and customer. B、Manager and customer. C、Employer and Employee. D、Landlady and tenant. B推断题。根据对话开头处女士对男士的称呼Sir可知，两人并不认

W: Sir, can I help you?
M: I bought a television set here last week and now it doesn’t work. I want to get a refund.
W: Do you have the warranty?
M: No, I’ve lost it.
W: Sorry sir. We must have the warranty.
M: But this is ridiculous. You sold me the set...
W: What’s the matter with it?
M: I don’t know.[14]When I turn it on, there’s no picture. Can you fix it?
W: I’m afraid we don’t do repairs here.
M: No repairs? This is unacceptable. I want my money back.
W: We don’t give refunds under such conditions.
M: But this is outrageous! MY-YOUR-TV set doesn’t work.
W: Bring the set in and we’ll send it to the factory for repair. Without the warranty, you’ll have to pay. It’ll take three weeks.
M: What? That just won’t do. I have the football final next week. I’ll miss the game.
W: We can rent you another set while this one is being repaired. The charge is 20 dollars a week.
M: Twenty dollars a week! That’s outrageous! Let me speak to the manager.
W: I am the manager.
12. What is the possible relationship between the two speakers?
13. Why did the man go to the woman?
14. What’s wrong with the television the man has bought?
15. How long will it take to repair the TV set, according to the woman?