A、8 hours. B、9 ～ 10 hours. C、10 ～ 11 hours. D、12 hours. C

W: Now then, Mr. James, what seems to be the matter?
M: I just can’t sleep, doctor.
W: I see. And how long have you had this problem?
M: Oh, for about two months now.
W: And how about your work?
M: Well, I have been working a lot lately-10 to 11 hours a day.
W: Maybe you should take a holiday and just relax for a while.
M: Well, I can’t right now. We’re in middle of some important business.
W: So,you’re worried about it?
M: Yeah, I guess so.
W: Well, maybe you should consider a job change.
M: Yeah, well, it’s pretty hard to find a new job at my age, you know.
8．From what time could the man not fall sleep at night?
9.How long did the man work every day?
10.Why did not the man want to change his job?