【正文】
1. It can be learned from the text that the aging of the population in America _______. A. has made people feel younger B. has changed people’ s social position C. has changed people’ s understanding of age D. has slowed down the country’ s social development 2. The underlined word “ one” refers to _______. A. a society B. America C. a place D. population 3. “ Act your age.” Means people should