【单选题】听力原文:M: I'm really sorry, Professor Irwin. I was sick yester-day. W: Look, I'm not upset that you couldn't keep the appointment, but it is common courtesy to call. You know that. M: Yes, I do. W: Duri...
A.
To discuss the results of the lab experiment.
B.
To answer Bob’s question about the lab experiment.
C.
To explain the method of collection by water displacement.
【单选题】听力原文:M: I'm really sorry, Professor Irwin. I was sick yester-day. W: Look, I'm not upset that you couldn't keep the appointment, but it is common courtesy to call. You know that. M: Yes, I do. W: Duri...