A、They make him feel good. B、They make no impact on him. C、They bore him. D、They make him angry. A

M: Hi, Janet, where were you at lunch time? 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: My political science class ran overtime.
M: That’s been happening quite a bit lately, hasn’t it?
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: Who is this twentieth century’s Operators?
W: Professor Howl. Have you heard of him?
M: Mh, he does have a good reputation in the politic science department.
W: And a well deserved one. The same students who fall asleep in discussion group and seminars fight for front-row seats in his lectures.
M: Oh, no. I hope this isn’t catching.
W: You can joke. But it’s great to have a professor who’s not only interesting but prepared to give up time to students.
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, and he says he feels flattered.
M: Well, just to be safe. I think I’ll bring my lunch along as well.
W: I’ll make a good student of you yet.
Q. 19. What habit has the woman recently gotten into?
Q. 20.How do the students demonstrate that they really enjoy Professor Howl’s class?
Q. 21.How does Professor Howl feel about visitors at his lecture?
Q. 22.Which word best describes Prof. Howl’s relationship with his students?