A、Patient and nurse B、Teacher and student C、Secretary and client D、Guest and receptionist B

W: Do you want to go running down by the lake after psychology class. I really like to take advantage of the beautiful weather this afternoon
M: Well, normally I begin to gather with my study group then, but I guess I can skip that just this once.
What does the man mean?

W: Hello, I’m Kate Simpson. I know Doctor, Wilson’s out of town at a conference, but I was wondering...um...since she won’t be back till next week, if you…if you could check in your computer records and find out how I did on her mid-term exam?
M: I’m sorry, Miss Simpson But I’m not authorized to give out that kind of information.
What’s the probable relationship between the two speakers?