听力原文：M: Could I have my bill, please? W: Certainly, sir. Here you are. M: Could you kindly explain this to me? What is item 7? W: Yes, sir. That's the service fee, 15 per cent. M. Oh, I see... I think there has been a mistake here. W: I'm sorry, sir. But what seems to be the trouble? M: I think you've charged me twice for the beer. Look, item 2 and item 6 are both about beer. W: I'll just check it for you, sir. Please wait here for a moment. M: OK, no problem. W: You're quite right, sir. The cashier made a terrible mistake. I think you will find it correct now. M: Good, thank you. Now, can you take my credit card? W: I'm afraid we don't accept credit cards. M: Oh, dear. Can I pay by traveler's checks? W: Certainly, sir. We'll give you the change in local currency if that is all right. M: You needn't worry about that. There won't be much change. W: Thank you, sir. M: You're welcome. (12)