People all over the world set great regard on good manners.
There are good manners in which we behave in public places.
If everyone has developed good manners…
People all over the world set great regard on good manners. To a certain degree， good manners indicate a person's good education and breeding. In schools， it is part of students' moral trailing to develop good manners. A person with good manners always wins praise. On the contrary， people will frown on him if he behaves roughly and impolitely.
There are good manners in which we behave in public places. It is a good manner to offer help to the young， the old and the handicapped when they are in need of it. So is it to behave politely and keep away from foul language. Besides， we should guard against such minor offenses as making a loud noise， casting peels and shells， smoking and spitting.
If everyone has developed good manners， people will from a more harmonious relationship. If everyone behaves considerately towards others and follows the social ethics， people will live in a better world. With the general mood of society improved， there will be a progress of civilization.
本文按照题目所给的纲要从三方面论述了文明礼貌的重要性。意思明晰，文理通顺。“frown on”，“keep away from”，“guard against”，“minor offenses”等小词用得准确自然，很好地传达了作者的意思。