A)The woman had been planning for the conference.
B)The woman called the man but the line was busy.
C)The woman didn't come back until midnight.
D)The woman had guests all evening.
原文：
M: I thought you were going to call me last night about the plans for the conference on language teaching.
W: Sorry I should have but Tom and Jane stopped by and stayed until midnight
Q: What do we learn from the conversation?