【正确答案】 B

【答案解析】[听力原文]18-20 W: Hi, Susan, Where are you at lunchtime? I was saving a seat for you in the cafeteria. W: Oh, sorry to miss you, but my thirst for knowledge was greater than my pains of hunger. M: I never had that problem. So where were you? W: I was in class. My political science class ran overtime. M: That's been happening quite a hit lately, hasn't it? There are some professors who just don't know how to show respect for timetable. W: I guess so. Actually, what happens is that a bunch of us hang around for a while after class to talk with our professor and ask him questions. M: Oh, I see, Your classmates are as knowledge thirsty as you. Who is this twentieth century Socrates? W: Professor Howl. Have you heard of him? M: Yes. He does have a good reputation in the political science department. W: And a well deserved one. The same students who fall asleep in discussion groups and seminars fight for front-row seats in his lectures. M: Really? Quite unimaginable. W: It's great to have a professor who's not only interesting but prepared to give up time to students as well. M: I know. They are a rare breed. Maybe I should sit in on his class some time. Do you think he'd care? W: Not at all. Lots of students bring their friends. He says he feels flattered. M: Well, just to be safe, I think I'll bring my lunch along as well. W: You will become a very good student.