听力原文：W: Hi, Tom. How's it going these days？
M: Fine. Where are you heading？
W: I'm on my way home from work.
M: I didn't know you had a job.
W: Yeah, [19] I work part-time at the library because I really have a lot of spare time this semester.
M: What did you do there？
W: Well, [20] I work in the information, giving suggestions to those looking for reference books. Sometimes when it really gets busy, I also help the librarians categorize the books. Have you got a job, Tom？
M: [21] I really want to, but I do have a hard time with the reading list and the courses I signed up for this term. Well, it seems that you work there every day.
W: Yeah, I think that's the trouble. There are times when I get pretty tired of answering different questions. But a job is a job.
M: I guess every job has its drawbacks. But today I do need some of your suggestions. I wonder if this book fits me.
W: Well, let me see. [22] I think the book has little to do with the topic of your paper. I mean you plan to write the present conditions of the Chinese minorities, but this book is about all the minorities in the world. I think it's too general.
M: Well, I'm afraid so. I think I have to look for another one. Thank you anyway.
(4)

A. She needs extra money.
B. She has much spare time.
C. She wants to buy many books.
D. She has to write term papers.