A、Five days. B、Six days. C、Seven days. D、Eight days. C问题问的是男士要预订多长时间。根据男士所说I’d like to book some rooms for tomorrow for a week可知

W: Bright Star Hotel.
M: Good afternoon. My name is Martin. I’d like to book some rooms for tomorrow for a week.
W: OK. What kind of rooms would you like?
M: Two single rooms and three double rooms.
W: Sure, we have single rooms at $ 30，$ 40 a night and double rooms at $ 40, $ 50 a night.
M: Fine. I would like single rooms at $ 40 and double rooms at $ 50.
W: So, two single rooms at $ 40 a night and three double rooms at $ 50 a night.
M: Yes, that’s right. Thank you.
W: You’re quite welcome.
Q17: How long does the man book the rooms?
Q18: How many rooms does the man book?
Q19: How much will the man pay for one night?