A、At once. B、Fifteen days later. C、By the 15th of this month. D、In the middle of this year. C

M: .., And where do you recommend I shall stay? What’s the Holiday Inn like?
W: Ifs nice there. It’s in the city centre and has all the usual business facilities you’ll need. The service is first class.
M: Oh, good. So I’ll get a room there. Now, what’s the best way to get into the hotel from the airport? Should I take a taxi?
W. Well, you can, but you don’t have to. The subway; system is very convenient.
M: MMM ... , Can you tell me something about the business hours? I mean, what time are the banks open?
W: The banks? They open at half past eight and close at four thirty.
M: I see. And are they open on Saturday too?
W: I’m afraid not. And I’d better warn you, the shops close early on Saturday. During the week they’re open until half past six, but on Saturdays they close al four.
M: At four! Right. Now, what’s the weather like at this time of year?
W: Well, it’s usually warm. But sometimes it turns very cold and wet. So don’t forget to take what you may need with you. By the way, when are you going on this trip?
M: Oh, not until the middle of the month. The fifteenth, I think. Anything else you want to advise me?
W: No, nothing I can see. It’s a nice country, peaceful and calm, and people are friendly. I’m sure you’ll enjoy your stay there.