【正确答案】 C

【答案解析】[听力原文] 14-16
For years, the elderly were the "forgotten" members of American society, but in recent times, this has changed. The elderly began to form groups such as the Gray Panthers to represent their rights and interests. These groups affected America politically, economically, and psychologically. Above all, they reminded America that elderly people are valuable and energetic citizens.
Today's elderly are active in all aspects of American society, especially in the work force. Many older people choose to return to work after their retirement. According to supermarket manager Aril Fitzpatrick, who has already hired eight people over sixty-five as cashiers and carriers, "Senior citizens are reliable and hard working. Perhaps that's because they have been through more. They have experienced the bad as well as the good in life, and they have learnt a lot of lessons that younger people have not yet learnt. My senior citizens work harder than many employees half their age."
The elderly have contributed much to America, and they will continue to do so.
As sixty-seven-year old Dorothy Jackson said, "Age is only a state of mind. The fact that you have grown old does not mean that your time to enjoy life, to be productive, to grow and learn ends."
[解析] 本题为细节题。听清原文“Many older people choose to return to work after their retirement.”即可获得答案。

【正确答案】 B

【答案解析】[解析] 本题为推理题。根据文章最后一段“The elderly have contributed much to America, and they will continue to do so. As sixty-seven-year old Dorothy Jackson said, 'Age is only a state of mind. The fact that you have grown old does not mean that your time to enjoy life, to be productive, to grow and learn ends'”可推断出老年人对美国社会是有贡献的，是有价值的。