America is growing older. Fifty - eight years ago, only 4 out of every 100 people in the United States were 65 or older. To day, 10 out of every 100 Americans are over 65. The aging of the population will affect（影响）American society in many ways—education, medicine, and business. Quietly, the graying of America has made us a very different society—one in which people have a quite different idea of what kind of behavior（行为） is suitable（合适）at various , ages.
A person s age no longer tells you anything about his/her social position, marriage or health. There’s no longer a particular year in which one goes to school or goes to work or gets married or starts a family. The social clock that kept us on time and told us when to go to school, get a job, or stop working isn’t as strong as it used to be. It doesn’t surprise us to hear of a 29 - year - old university president or a 35 - year -old grandmother, or a 70 year - old man who has become a father for the first time. Public ideas are changing.
Many people say, “I am much younger than my mother— or my father— was at my age. ”No one says“Act your age” any more. We’ve stopped looking with surprise at older people who act in youthful ways.
小题1:It can be learnt 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小题2:The underlined word “one” refers to ________ .
A．a society
B．America
C．a place
D．population小题3:“Act your age” means people should ________ .
A．be active when they are old
B．do the right thing at the right age
C．show respect for their parents young or old
D．take more physical exercise suitable to their age小题4:If a 25 - year - old man becomes general manager of a big firm, the writer of the text would most probably consider it ________ .
A．normal
B．wonderful
C．unbelievable
D．unreasonable
小题1:C
小题2:A
小题3:B
小题4:A
题目分析：
小题1:C 推理题。根据第一段倒数两行和文章第二段内容people have a quite different idea of what kind of behavior（行为） is suitable（合适）at various , ages. 和Public ideas are changing.说明美国人对年龄的看法已经有了变化。故C正确。
小题2:A 推理题。根据the graying of America has made us a very different society—one in which people have a quite different说明这里的one与前面的a very different society是一个同位语关系，就是指a very different society故A正确。
小题3:B 推理题。根据Many people say, “I am much younger than my mother— or my father— was at my age. ”No one says“Act your age” any more.说明这里的“Act your age”是指做你所做的年龄该做的事情，现在这种情况已经有了很大的变化。故B正确。
小题4:A 推理题。根据第二段最后三行It doesn’t surprise us to hear of a 29 - year - old university president or a 35 - year -old grandmother, or a 70 year - old man who has become a father for the first time. Public ideas are changing.说明人们对年龄的看法已经有了很大的变化，对于题目中的事情会感觉很正常。故A正确。
点评：文章介绍了美国的人口老龄化让每个人对待年龄的看法也起了变化。以推理题的考查为主，不能以自己的观点代替作者的观点，推理的根据来自于上下文，最主要的方法是根据词义关系推断具体细节。