根据首字母提示在横线处填入适当的词（英语）

You must have heard the term 'etiquette'.It means nice and polite behavior.But sometimes 'etiquette' makes some people uncomfortable and annoyed,for example,you want to play loud music at home,but the neighbors in the yard would ask you to turn it down right away.Even it you are with your friends,you have to keep your voices down in public places.We should also take care not to clamor or shout loudly in public.What is worse,a good behavior in Europe may be regarded as an impolite one in some Asian countries.How can people in modern societies find solutions to relax themselves in spite of the etiquette?
难度太大