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?