听力原文：W: You seem to have a lot of work to do at your office. You are always staying late and working overtime.
M: That's true, but it's no bother to me. The work is interesting and I don't mind extra hours at all.
How does the man feel about his job？

A. He takes pleasure in doing his job.
B. His job always bothers him, but he doesn't mind.
C. Working overtime is really interesting for him.
D. His job keeps him from working extra hours.