dialogue: M: Good morning, Mr. Carson, please? W: I'm afraid Mr. Carson is at a very important meeting at the moment and cannot be disturbed. May I know who's calling? M: Yes, this is Mr. Prince. I would like to talk to Mr. Carson today, if possible. W: Well, I'm afraid the meeting won't finish until one o'clock and then he has a lunch appointment. If he has time, I can ask him to ring you before he leaves. M: OK. I'd be grateful if you would. W: Not at all. Mr. Prince. Could I take your telephone number and then I'll ask Mr. Carson to ring you as soon as he's free? M: Yes, it's Hong Kong--68261427 extension 4036. W: Hong Kong--68261427 extension 4036. Right. Perhaps he has no time to ring you this morning, but I will ask him to ring you as soon as he returns from lunch. M: Thank you.
question: What's Mr. Prince's telephone number?
choice: 68621427 extension 4063. 68262714 extension 4306. 68261427 extension 4036.
answer: 68261427 extension 4036.