A、On Sunday. B、On Saturday. C、March 23. D、March 10. C对话最后，女士问男士想什么时候住，男士说想两个星期之内搬进来；之后女士将时间定在周一，也就是3月23日，男士表示同意。

W: Good morning, what can I do for you?
M: Good morning.(15)I’m wondering if you could help me get a host family.
W: Well, yes.(15)Just sit down and let me ask you some details.
M: Thank you.
W: Um, which area do you prefer to live?
M: Well, I’m studying right in the city center, but I like to live in the southeast.
W: OK. And do you have any particular requirements on diet?
M: Well, yes. I’m nearly a vegetarian.
W: Anything else about the condition of the host family?
M: Well, I’m really serious about improving my English, so it would be best if I were the only guest.
W: Yes, you can get more practice that way. It is possible, but it partly depends on how much you’re willing to pay. What do you have in mind?
M: Maybe $ 60 to $ 80 a week,(16)but I’d up to $ 100 if it has something special.
W: OK. When would you want it?
M: I’d like to move in about two weeks.
W: Let me see, it’s the 10h today, so what about on(17)Monday, which is March 23?
M: Yes, thank you.
15. What’s the most possible relationship between the two speakers?
16. What can we learn about the man?
17. When can the man move in?