obay

To obay the rules at public places is important to everyone.Without rules, we can't have a good environment to study or work.Then, what are the rules we should obay in a library?For example,we should be quite.we also should take care of our own things.And we must put the books to where it belongs.We must remember that we shuold not eat and drink in the library.And we must not damage the books.We are absolutly not taking books out of the library.