A、Customer and salesperson. B、Teacher and student. C、Boss and secretary. D、Guest and waitress. C关键是听到男士让女士复印20份并送给执行总裁以及各部门经理，女士

W: This school is lucky to have a teacher as good as Prof. Helen Johnson.
M: She is one in a million. We’ve all benefited from what she imparted to us. I wish I could have taken more courses she teaches.
Q: What does the man mean?

M: Please make 20 copies of this and deliver them to the chief executive and heads of departments. I hope they can review it first before the formal meeting.
W: Certainly, sir. They will find it on their desks tomorrow morning.
Q: What is the probable relationship between the two speakers?