单项选择题

[听力原文]9-10
M: Good evening.
M: Hello. Do you have any vacant rooms at your motel
W: I believe there may be one. Did you make a reservation in advance
M: No, we didn’ t.
W: Well, we just received word that one reservation has been cancelled, so you arrived at a good time.
M: I suppose so. By the way, how much is the room
W: It’ s $ 50 with a color TV and an extra bedroom. We have a pool in the back.
M: That’ s good. We need the extra room for our three kids.
W: If this is OK, please step into out office to register.
M: Do you want the payment in advance
W: That’ s our policy. I’ m sure you understand.
M: Of course. What’ s the number of the unit
W: No. 60, on the third floor, over on the left. Here is the key.
M: Thank you. I’ll park the car over there first. Then I’ll come right over to register.
W: Certainly, sir.

When does the motel want its guests to pay（）

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