A.Take a class together with Mary. B.Ask Mary to help him choose a topic. C.Change the topic of his research project. D.Sign up for a different political science course.
【单选题】听力原文:Do I need my coat today, or is a sweater OK? (A) Not at all. (B) It's pretty warm outside. (C) Both of your coat and your sweater look beautiful. (27)