题目内容：

Humans like to live and work in groups. Language is the “cement”(胶合剂)1.holds these groups together. Language is part of culture. Culture, in this sense2.(mean)all those customs, skills, and attitudes that are part of the behavior of a  3.(particularly) group. What you think  4.what you want in life are all affected by the culture of the group in which you5. (raise). Groups of people live in different ways. They may have different skills, organizations, and art forms. Their family life may be completely different from yours.

Human beings are inventive animals. They can decide to change their cultures in order to meet various6.(situation). Of all living things, human beings are the  7.(clever). They can choose 8.(live)in many environments and in a wide variety of ways. Only human beings can choose where and how they want to live and then improve the physical environment to help9. (they)realize these choices. Acquiring the wisdom to make wise choices 10.(be) the lasting challenge of being human.