F: This is Professor Brown's first lecture. What do you think of it? ,M: Wonderful! I have learned quite a lot today, which might be useful for my work after graduation. What's your opinion? ,F: I think so. He is so knowledgeable. His topic is close to our life, and his language is full of humor.
(A) M: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (B) M: Yes, I agree with you, Professor Brown is always erudite. I like him very much. (C) M: I think although the lecture is interesting, it isn't useful for my work. (D) M: Yes, Professor Brown's work is always great.
A