【正确答案】 B

【答案解析】[听力原文]17-20
W: Morning, John ! You are late again !
M: Oh, Jane, I' m terribly sorry.
W: So, what' s the excuse this time?
M: Well, you see, I forgot to set the alarm clock last night and I...
W: Yeah, and last week it was broken.
M: Yes, I know...
W: Hmm! I hope you won' t find something wrong again next time.
M: I promise you it won' t happen again.
W: What about the tickets for the concert tonight?
M: Oh, I' m really sorry. I did the booking too late, and all the tickets had been sold out.
W: You should have booked earlier.
M: I' m so sorry. I'll try to get the tickets next time. I promise.