单项选择题

The author gives the example of Henry Metcalf to show that ______.

A．older parents should exercise more to keep up with their athletic children
B．many people are young in spirit despite their advanced age
C．older parents tend to be concerned about their aging bodies
D．taking afternoon naps is a good way to maintain energy

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单项选择题

What does the author mean by saying For many, retirement becomes an unobtainable dream (Lines 7, Para. 1)

A．They are reluctant to retire when they reach their retirement age.
B．They can't obtain the retirement benefits they have dreamed of.
C．They can't get full pension unless they work some extra years.
D．They have to go on working beyond their retirement age.

单项选择题

What do we learn about Marilyn and Randy Nolen

A．They thought they were an example of successful fertility treatment.
B．Not until they reached middle age did they think of having children.
C．Not until they had the twins did they feel they had formed a family.
D．They believed that children born of older parents would be smarter.