A、In a classroom. B、On a bus. C、In a theatre. D、In a library. C

M: Er, could you please tell me how much this tie is?
W: Yes, of course. It’s 7 dollars, sir.
Q: If the man pays a 20-dollar note for two ties, how much will be the change?

W: Excuse me, sir. But I think you’re sitting in my seat.
M: You’re right. My seat is in the upstairs. I didn’t see my ticket clearly. I’m terribly sorry.
Q: Where do you suppose the above conversation takes place?