A: Can I help you?

B: Yes, I want to check in those books.

A: Ok. Let me see. En, there is one book that has been overdue（超期）.

B: Oh, I am sorry. I almost forgot these books when I saw them yesterday.

A: According to the fines（罚款） policy, you must pay 1 yuan for this book.

B: Must I pay for it? It only passed five hours .

A: Yes. If you don’t pay for it, you may not borrow other books any more.

B: Ok. Here you are.

A: And please sign your name on this paper.

B: Ok.

A: Remember to return your books on time.