A、A professor and a student. B、A customer and a cashier. C、An editor and an author. D、A lawyer and his client. A

M: My back is still hurting from the fall I had from my bike last week. I wonder if I should visit a doctor.
W: Well, it could be due to internal injuries. To play it safe, you probably should.
Q: What does the woman suggest the man do?

M: When is the assignment due? And what type of report do you want?
W: It’s due to the fifteenth. I expect a full research project, about 20 pages and typed.
Q: Who are the two speakers?