Ответ:
1... always very positive. I enjoy dealing with well-mannered people. I am unfailingly polite myself and see no reason why shouldn't everyone else be considerate and attentive
2...usually beneficial. My friends and family are nice people and rarely have anything to do with rude or even impolite men
3...important and far-reaching. Any school is supposed to create a friendly and supportive environment for everyone. I simply don't see how that is possible without people being nice to each other
4...without any exaggeration profound! There would be fewer conflicts if only we made a tireless effort to change ourselves. Nice people don't fight with each other