A、Free. B、125 pounds per year. C、25 pounds per year. D、18 pounds per year. B对话中女士解释费用问题，本校学生免费，其他人125英镑，其他学校学生25英镑，男士说明自己已经参加工作了

M: Excuse me! I was wondering if it was possible to join the library.
W: Are you a student in our college?
M: No, I’m not. But I heard that it was possible to join.
W: That’s right(23)The 18 years of age is the minimum joining age.
W: Well, you need to fill out some forms. You will also need to bring two passport photos with you. We also need two documents for ID, so a driving license would be fine.
M: Good. Does it cost anything to join?
W: (24) Well, it’s free for students here but otherwise it is 125 pounds per year or 25 pounds when you’ve got a current student card from another college.
M: I was at West College until last year(24)but now I’ve got a job. But it is too expensive. However. it’s only eight items for members of the public
M: And what happens if I return them late?
W: Like all libraries, here is (25) a fine system in place. The minimum fine is 1.5 pounds but it can be much higher for some items up to 5 pounds. We will give you a booklet with all the details when you join.