题目内容：

Ever since humans lived on the earth,they have made use1.various forms of communication.In general,the major form of expressing thoughts and feelings2.(be) spoken language.3.there is a language barrier, communication is completed through body language.Smile is the most universal4.(face) expression,which shows happiness and puts people a ease.But sometimes,it is likely to hide other feelings,like5.(angry) and worry.There  6.(be) different ways to greet someone in different countries.People from Columbia like approaching others and kiss them on7.cheek.In France,if adults meet people they know,they can kiss each other twice on each cheek. Being polite to others is8.(object),but we'd better not give a hug to a person with higher rank.Body language is  9.(real) complex, so we should study international customs10.(avoid) difficulties in today's world of cultural crossroads.