A、A trip abroad. B、The teacher’s suggestion. C、A weekend activity. D、A future plan. C本题提问的是对话的主题。对活中男士引㈩周六出去玩这件事，接下来他们就去哪里玩进行讨论，

M：Hi I have some good news for you.
W：What is it?
M：The teacher suggested that we go on a trip this Saturday.
W：Oh，wonderful. Where shall we go?
M：How about going to the park?
W：I don’t think it’s a good place to go to. We can go there another time.  We should so farther away this time.
M：Where do you think we should go then?
W：How about the river in the suburbs?
M：I don’t think it’s a good idea. It’s not safe. Why not go to the mountains instead?
W：That sounds good. Let’s go to the mountains to the south of the city.