at the libarary

Last weekend, my family and I went to the National libraryto borrow some books for my sister and I.When we reach there, I saw piles of book on the shelves.There were many children in the library.Some of them were reading quietly.One of the girls was putting the book back to the shelf .Some of the children were lining up waiting for their turn to stamp a date on the they wanted to borrow .They were also very quiet.The librarian said that I should return the book within three weeks' time or I will have fine to pay.After that,we went back home happily.