A、He is waiting for Professor Johnson to have an interview. B、He is waiting for Professor Johnson to take the homework. C、He is

W: Hi, Samuel, what are you doing here?
M: I’m waiting to see Professor Johnson. He asked me to have an interview today.
W: An interview? What kind of interview?
M: Well, I got the highest grades in his class last term, so he wanted me to work as his assistant next term, I do not have any idea about that job.
W: Don’t worry about it. I did it one year ago.
M: Really? Can you tell me something about it? Did you like it?
W: Yes, I did.
M: What did you do?
W: I was in charge of grading all the assigned homework. I never had trouble doing it, and of course, Professor Johnson was always available to help me if I had any questions.
M: I think I’ll enjoy doing that sort of work. It would be very good experience for anyone thinking about becoming a teacher.
W: Absolutely. You also learn how to use the computer, because all the records are kept on it. Improving your computer skills is a good preparation for lots of jobs.
M: But I’m a little worried about how much time it might take.
W: It’s pretty reasonable. It never took me more than five hours a week to do all the grading and then another thirty to forty minutes to record the grades on the computer.
M: It sounds great.
W: Oh, yeah, you can also do the grading in your room or in the library. You just need to get each set back for the next class, but that means you always have at least two days, and sometimes four.
M: Thank you for telling me so much.
W: Good luck with your interview.