13.
W: Have you bought all the books you need this semester yet?
M: I've bought a book for listening practice, but the textbooks for intensive reading and literature were sold out.
Q: Which course has the man got a book for?
正确答案：D
解析：男士说他“买了一本听力书”，可知选项D（听力）正确。听到listening practice便可顺利作答。否则，听到intensive reading and literature，也可以同时排除A、C，两者并列出现不会是正确答案。

14.
M: How do you balance work and study at the same time?
W: My classes are at night and I work during the day.
Q: What do we learn from this conversation?
正确答案：D
解析：女士说她“晚上上课，白天工作”，故D（女士晚上上课）是正确答案。