【正确答案】
B
【答案解析】[听力原文]
W: Good morning, can I help you?
M: Yes, I"m Stone Williams. I"ve reserved a room here.
W: Let me check. Yes, a single room for one night.
M: That"s right.
W: Would you please fill out this registration form?
M: Certainly. Oh, how much do you charge a day?
W: 30 dollars a day.
M: All right, here is the form.
W: Thanks. Here is your room key. Have a good day.
M: Thanks.
What is the conversation about?