Student: Teacher.

May I borrow this book?

T: Yes, for three days.

When does this book expire?

T: It's due on Monday the 25th.

How much is my fine?

Conductor: You owe 50 cents.

T: Be sure to take good care of these books.

I will.

Don't write in the book.

S: No, I won't.

t； Don't tear off the pages.

S: No, I won't.

T: Make sure that the books you return are in good condition.

S: Of course. I will.

T: Make sure you return the book on time.

When do I need to bring them back?

t； You need to return them by Tuesday.

Can you help me find a book, red and black?

T: book in area a or area B.

S: Thank you.

T: you're welcome.

Finally finished, so tired.

I have written down your serial number, and I will make it for you when it is adopted.