M: I'm not satisfied with it. ,F: Why not? What's wrong with it? ,M: Sometimes it goes fast and sometimes it goes slow, and the alarm doesn't work either. ,F: Would you like another one? ,M: No, can I have my money back? ,F: Emm, have you got a receipt? ,M: A receipt? ,F: Yes, I must see your receipt. You can't have your money back without a receipt. ,M: Though I'm not certain, but I think I've lost it.
(A) F: I didn’t hear you. Please could you tell me again? (B) F: Sorry. We can't return your money, but I can change another one for you. (C) F: Sorry. We can't change another one if this one is in good condition. (D) F: Oh, you have kept the receipt. We can return your money now.
B