听力原文：M: Hi, Margaret, where were you at dinner-time? I was saving a seat for you in the coffee shop. W: Oh, sorry to miss you. But my thirst for knowledge was greater than my pains of hunger. M: So where were you? W: My physical science class ran overtime. Actually, what happens is that some of us hang around for a while after class to talk with our professor and ask him questions. M: Who is this 21st century's Newton? W: Professor Greg, have you heard of him? M: Yes. He does have a good reputation in the Physical Science Department. W: And a well deserved one. The same students who Pall asleep in discussion group fight for front-row seats in his lectures. M: Oh, on. I hope this isn't amazing. W: You can joke. But it's great to have a professor who's not only interesting but prepares to give up time to students. M: I know it is really rare. Maybe I should sit in 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 dinner along as well. W: I'll make a good student of you yet. (20)