听力原文： [Narrator] Listen to part of a conversation on campus between a student and a pr

ofessor. [Student] Hi. Im Ron Watson. Im here to apply for the work-study job. Q18 [Professor] Oh, good. Um, have you ever had a work-study position？ [Student] Not really. To tell the truth, Im not exactly sure how it works. [Professor] Well, its like this: on work-study, you have regular hours and assigned responsibilities, but, if you get everything done, you can study. You cant leave because there may be something else to do later, during your hours. But you should always bring your books and, oh, Id guess that probably about 25 percent of the time, you should be able to study. [Student] This is even better than I thought. What kind of assignments would I have, I mean, if I Q19 get this opportunity. [Professor] Clerical mostly, Im afraid. Nothing too demanding, but it isnt the most interesting work ether. Filing, copying, delivering mail, uh, some grading, but only multiple-choice tests, and we use a grading machine for that. [Student] Would someone show me how to operate the grading machine？ Im sure I could do it if someone showed me once or twice. [Professor] No problem. We have a secretary here in the department, and shell be the main person youd report to. Shed show you how to do everything. [Student] Okay. Great. [Professor] Now, lets see whether your hours will fit in with the hours we need. Could you work Monday through Thursday from ten to two？ [Student] Thats sixteen hours a week？ [Professor] To start. We may actually want to extend that to Fridays, so, if that happens, it would be twenty hours. Youll notice that the hours include the usual lunch break. That would let Nancy... shes the secretary... so she could get you started on the work, and then take her lunch from noon to one, and be back for the last hour of your day, in case you had any questions. [Student] Okay. [Professor] Oh, and I should tell you about the phone. While Nancys gone for lunch, well want you to answer the phone. [Student] Sure. I can do that. Uh, will there be any work on the computer？ Im familiar with most Q20 of the basic office programs. I used to help my Dad in his office when I was in high school. Hes a lawyer. [Professor] Oh. Well, we hadnt planned to include anything like that in the job, but its a plus. [Student] Sorry to ask, but ... how does the pay work？ Do I get paid for the time I work minus the study time or... [Professor] Oh no. You get paid for sixteen hours a week whether youre working or studying. This Q21 is a special program for students. [Student] It seems too good to be true. [Professor] Well, you need to have an interview with Nancy. Since youll be working closely with her, shell make the final decision. [Student] Okay. Should I make an appointment or... [Professor] No. Just go over to her desk and tell her who you are. Shes expecting you. We want to get the position filled as soon as possible. [Student] Well, thank you for seeing me. I hope Ill be working here. [Professor] Good luck.... Oh, yes, be sure to tell Nancy about the computer experience. Q22 [Student] I will. [Professor] And let her know Ive already interviewed you, and I referred you to her. [Student] Thanks again. I really appreciate your taking the time to explain everything to me. [Professor] Youre welcome."Professors Office"

Why does the student go to the professors office？

A．To change his schedule

B．To apply for a job

C．To introduce himself

D．To help the professor