18. A) The man shouldn’t hesitate to take the course.
　　B) The man should talk with the professor first.
　　C) The course isn’t open to undergraduates.
　　D) The course will require a lot of reading.
　　答案：
　　18. A)　The man shouldn’t hesitate to take the course
　　原文：
　　18. M: Have you heard of Professor Smith? I’m thinking of taking an advanced engineering course with him. What do you think?
　　W: Yeah! You really should. He’s published dozens of books so far. One has been recommended as a textbook for postgraduates.
　　Q: What does the woman imply?