A、More work as an instructor. B、A higher salary. C、A longer vacation period. D、A research assignment. A主旨题。观察本题的四个选项，work、salary

M: Hello, Prof. Dianna, you wanted to see me?
W: Oh, yes, Frank. Thanks for coming. It’s about your work as a teaching assistant. I’ve just read your evaluations, the ones the students filled out toward the end of the semester.
M: Yes... ? Well, how were they?
W: Would you like to take a look? Out of a possible score of five, you got a four-point-eight. That’s very high, Frank.
M: Well, what a pleasant surprise.
W: When we see such a high score, we generally try to keep the Teaching Assistant on a little longer and perhaps even ask them to cover more classes. What do you say, Frank? Would you like this?
M: I sure would, but I don’t know if I can. Next fall will be my last semester of coursework for my master’s and I’ll be very busy doing re search on my thesis. Could I have a few days to think about it?
W: Certainly, I wouldn’t want you to fall behind in your course-work, but I do think you should consider getting more experience in the classroom. You seem to have a real gift.
M: Thanks for your praise, Professor.
W: Let me know by the beginning of next week, will you?
M: Sure thing. I’ll drop by again on Monday or Tuesday.