13. A) The man regrets being absent-minded.
B) The woman saved the man some trouble.
C) The man placed the reading list on a desk.
D) The woman emptied the waste paper basket.
答案：
B) The woman saved the man some trouble.
原文：
13.M: I wish I hadn’ t thrown away that reading list!
W: I though you might regret it. That* s why I picked it up from the waste paper basket and left it on the desk.
Q: What do we learn from the conversation?