【正确答案】 B

【答案解析】[听力原文]6-7
M: I met Billy today in the street.
W: How's he going?
M: He told me he just got back with Jane from a trip to Canada.
W: They did? So what did he say about Canada?
M: Oh, they had a good time. He said we'd really enjoy it if we were there, too.
W: Did you ask how the weather was?
M: It seems it's rather cold in the city, but nice and warm along the coast.
W: Did he say where they stayed?
M: He told me, but I forget.
W: Well, did he say the hotels were crowded?
M: Yes. At this time of year they always are, and he suggested we make our plans as soon as possible.
W: All right. We'd better do some checking now. Do you still have the guidebook?
M: Yes, here it is.

在第一轮对话中，男士提出自己碰到了Billy，由此可知Billy是他的朋友；然后第二轮对话中又提到Billy与Jane去加拿大旅游的事，对话就是围绕他们在加拿大旅游过程中的一些事情，因此对话的主旨就是他们的朋友的旅游，选[B]。

【正确答案】 C

【答案解析】本题为细节题，只要听清了男士第四轮对话中的but nice、and warm along the coast即知选[C]。