【答案解析】[听力原文] {{B}}Bridging the Generation Gap{{/B}} America is getting older. In the span of a generation, the average age of U. S. citizens will increase from 32.9 years in 1990 to 37. l years in 2020. As the "baby-boom" generation ages, the proportion of America's population who are age 65, and over, will increase, in that year, Americans aged 60 and over will comprise nearly one quarter of the population. Thus it becomes increasingly important for this country's youth to develop a relationship with our elderly population. New York developed a program to achieve this goal in the late 1970's. Students were writing their autobiographies as part of an interdisciplinary section on immigration and assimilation. The seniors came from many ethnic and racial backgrounds and many of the seniors had immigrated to America in their youth. Through the presentations and discussions, the students learned about overcoming adversity and achieving happiness and fulfillment. The students learned about topics that weren't covered in most textbooks.