A、Good friends. B、Boss and secretary. C、Strangers. D、Host and guest. C对话中，女士询问男士他们部门有没有一个叫Ben的人，男士回答说他是新来的。由此推断，两人可能是陌生人。

W: Well, we have waited for Mary for 45 minutes.
M: Take it easy. Just stay another ten minutes.
Q: How long will they wait for Mary in total?

W: Is there a man called Ben in your department?
M: I’m sorry. I’m new here.
Q: What’s the probable relationship between the two speakers?