A、Expensive. B、Cheap. C、Worth the money. D、We don’t know. CHow about the cost of the night school?题目询问夜校的费用，根据凯特说的“Any-way it’s

M: May I come in?
W: Yes, of course.
M: Hello, Kate. Where is Jane? I want her to type this letter for me.
W: I’m afraid she can’t. (8)She isn’t working today. She is studying, for the exam.
M: The exam? Is she going to school?
W: Yes, she is. She is learning Japanese at night school.
M: I see. Are you going to night school, too?
W: No, I’m not, not this year. (9)But I’m thinking about taking a course next year.
M: That’s a good idea is that expensive?
W: No, not very. (10)Anyway it’s worth the money.
Why can’t Jane type the letter for the man?