What is the woman’s problem?

W: Good afternoon, Professor Miller. May I speak to you for a minute?
M: Sure, come in, please.
W: I’m now taking your course in geography. Your lectures are really inspiring. But I’m... having a little bit problems with the latest assignment.
M: Oh? What sort of trouble are you in? Is the assignment too difficult?
W: Well, the assignment question is ok, but it’ll be due on next Monday. I think such a deadline is too tight.
M: If I were you, I’d have saved every minute to do the work instead of complaining.
W: I know... but I have to work part-time to support myself after school, so a lot of time has been occupied by my work.
M: Er. .. well, it seems you do have some reasons. OK, I can give you some extra time. Then you should turn in your homework before next Thursday.
W: Thank you very much, professor!
M: By the way, have you gone through the references I’ve mentioned on the reading list?
W: I’ve been to the school library for several times, but those books are not available these days. So I just refer to some relative journals.
M: Well, I’ll give you my written permission, so next time you can have the priority to borrow the books from the library.
W: That’s very kind of you, thanks a lot!