【正确答案】
A
【答案解析】[听力原文] 19-22
M: Thank you for agreeing to see me at this time, Mrs Green.
W: You are welcome, Cai. I assumed that you had something you need to discuss with me.
M: Yes, Ma'am. You are right. You see, many of my classmates are anxious to make an appointment to talk with you, but the office hours you have posted are a problem.
W: How's that, Cai? I have posted several hours in the early afternoon three days a week.
M: Well, there is a problem, not with the number of hours but with the time.
W: Really?
M: Yes. All the students in my grade have classes during those hours; none of them can come to see you then. I was wondering if you could reschedule your office hours?
W: Cai, I should have asked when would be a convenient time to schedule office hours. I was just not thinking clearly; I set the hours without consulting anyone. That was not very smart.
M: Then you wouldn't mind rescheduling so that my class could come?
W: Not at all; now tell me when your class is not already occupied, and we can work this out today.
19. What is the relationship between the two speakers?