Conversation 1
[听力原文]6-7
M: Waitress.
W: Yes, sir.
M: Could I have some oranges
W: Yes, but that would be extra.
M: I’ll be glad to pay. How much is it
W: Sixty cents for an order.
M: Get us two, please.
W: Yes, sir.
M: Could you pass me the table salt
W: Yes, sir.

What’s the relationship between the two speakers（）

A．Passenger and driver.
B．Secretary and boss.
C．waitress and customer.
D．Shop assistant and customer.