听力原文:M: Catherine is taking a microbiology course this semester. W: Should she be taking that this year? Q: What does the woman imply that Catherine should be doing? (19) A.Studying microbiology for a year. B.Teaching biology. C.Taking a nap. D.Taking a different course.
A. W: B.Studying C. B.Teaching D. C.Taking E. D.Taking F.