【答案解析】[听力原文] 8-9
M: You look pale．Linda. Is everything all right?
W: No．I lost my textbook on my way back from school．
M: Did you stop by any place?
W: Yes. I stopped by a post office to buy some stamps．
M: Think carefully whether you put your book down．
W: Maybe you are right．I will go back and see if it is still there. Thank you．
[解析] 本题为细节题。根据对话，男子问琳达为什么神色异常，琳达回答说从 学校回来的路上丢了课本。因此答案为C，琳达丢了书。