A、Instructor and student. B、Police and driver. C、Physician and patient. D、Waitress and customer. D职业身份题。女士问是否要点开胃菜，男士说自己比较喜欢这些东西

M: What do you do in class when students do not speak English but speak their own language instead?
W: I don’t know. I mean, I haven’t had much success really, so I’ve actually been pretty casual about it.
Q: What are the two speakers talking about?

W: Can I take your order for an appetizer?
M: I quite like the look of several of these. Now the melons does that come with anything else?
Q: What’s the probable relationship between the two speakers?