Please keep quiet! Please keep quiet!

You should return the book on time. You should return the borrowed books to the library on time.

When you finish reading this book, you should put it back on the right shelf. When you finish reading it, you should put it back on the right shelf.

4. Take good care of this book. Take care of books.

Don't draw or write anything on paper. Don't scribble on the book.

Don't get the book dirty. Don't get the book dirty.

Don't take the book home. Don't take books out of the library.

8. Smoking is forbidden here. Don't smoke here.

Don't tear the book. Don't tear the book.

10, never eat in the library. Don't eat in the library.