218.
W: Yes, sir. May I help you?
M: I have a reservation for tonight. John Durgin.
W: Just a moment, please. Let me check. That's right. You have a reservation for a two-room suite for tonight.
M: I'm afraid there's been a mistake. I only reserve a single room, not a suite.
W: I'm sorry, Mr. Durgin, but this is what is available. Your reservation arrived too late to have a single. There's a large conference in town this week and we're full up.
M: Well, if that's the way it is, I'll have to take it.
W: Please sign the register here. Your suite is 526.
M: Thank you.
W: The lift is on your right, sir, and I'll have your bags sent up in a moment.
M: Fine, thanks.

答案解析：
(1) 正确答案为B。根据You have a reservation for a two-room suite for tonight.您今晚预订了双人套房。可知，对话发生在酒店，因此B项正确。
(2) 正确答案为A。根据I only reserve a single room. 我只订了单人间。可知，男子想要的是单人间，因此A项正确。
(3) 正确答案为B。根据Your reservation arrived too late to have a single.您预订的太晚了，没有单人间了。可知，男子不能住单人间的原因是他预订的太晚，因此B项正确。