题目内容

Paragraph 4__________.

A. It is not beneficial for people to keep mentally active.
B. Intellectual activity can strengthen people's mental health regardless of their age.
C. Old people should engage in both mental and physical activities.
D. Old people only need to engage in physical activi-ties individually.
E. People with an active mind are more cognitively healthy in their old age.
F. Many experts are putting the theory to work in their own lives.

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A．courseB．lengthC．timeD．state

A. course
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B. to attract its enemies
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Which of the following is true according to the passage？

A. The widowed seem to have a longer life expectance.
B. Those who have a normal marriage life live longer than those who do not.
C. Single people live a shorter life because they are lonely.
D. Mothers of four children live a longer life than childless women.

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