单项选择题

According to Hellman, we know that ______.

A．the wisdom of older people has been fully used
B．the wisdom of older people is not valued by American society
C．older people's wisdom is an invaluable resource to American society
D．older people are as intelligent as young people

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单项选择题

We can conclude from the passage that the author ______.

A．tries to justify the youth-oriented, throw-away culture of the American society
B．suggests that people should not retire at the age of 65 or 70
C．thinks that the value of older Americans is gaining increasing recognition
D．thinks young people should give more respect to old people

单项选择题

After age 40, people find it hard to get rewarding jobs because ______.

A．their abilities and physical strength start to become weak
B．the inherent characteristics of our value system makes it so
C．they don't want to be rejected
D．they have no courage to venture