参考答案

正确答案：C
解析：W: Do you know anything about Prof. Smith's class?
M: If you are looking for an easy course, forget it. Prof. Smith writes the trickiest exams in the department.
Q: What do we learn about Prof. Smith?
女士询问男士关于史密斯教授的课，男士回答“如果你想选门简单的课程，那你趁早不要选史密斯教授的，因为他的考试是系里最难通过的。”由此可知答案为[C]。trickiest exams 意为“最难的考试”。