M: I'm excited about going to the concert at the campus pub on Saturday. It's supposed to be the best show of the year. You're coming, aren't you?
W: I wish I could, [9] but I already promised Lisa that I would cover both of her night shifts at the movies tore this weekend.
M: [ 8 ] Why did you do that? Did you forget about the concert?
W: Actually, I really need the hours. Next semester is going to be really expensive. I have to buy a new psychology textbook that is going to cost me more than one hundred dollars.
M: Have you looked in the used bookstore for it? I never buy my math textbooks new.
W: [ 10 ] That's what I would normally do, but it's a new edition this year. Some of the chapters are different so I really need to buy the new one.
M: That's too bad. I wish you could come to the concert. If it makes you feel any better, [ 11 ] Matt won't be able to come either.
W: Why is that？ [ 11 ] It's his favorite band!
M: [11 ] He has to go home for the weekend. His sister is getting married.
What are the speakers discussing?
【听前预测】
①三项均为名词短语。
②两项含有与学期或课程相关的词(next semester，psychology class)，两项含有与音乐会或乐队相关的词(concert，band)。
结论：该题可能考查与上课或听音乐会相关的内容，具体信息需要根据对话内容进一步判断。
【解析】本题为主旨题，需要对对话内容加以总结。对话开头男士说周六可以去听音乐会，自己很兴奋，并觉得女士应该也会去，当听到女士说周末要替别人值夜班时男士很诧异，接着对女士这样做的原因进行了询问，故可知B项 “女士不能去音乐会的原因”为两人谈话的主题。