Part II Reading Comprehension (35 minutes)
Questions 21 to 25 are based on the following passage.
Researchers have established that when people are mentally engaged, biochemical changes occur in the brain that allow it to act more effectively in cognitive (认知的) areas such as attention and memory. This is true regardless of age.
People will be alert (警觉的) and receptive (接受能力强的) if they are faced with information that gets them to think about things they are interested in. And someone with a history of doing more rather than less will go into old age more cognitively sound than someone who has not had an active mind.
Many experts are so convinced of the benefits of challenging the brain that they are putting, the theory to work in their own lives. "The idea is not necessarily to learn to memorize enormous amounts of information." says James Fozard, associate director of the national Institute on Aging. "Most of us don’t need that kind of skill. Such specific training is of less interest than being able to maintain mental alertness." Fozard and others say they challenge their brains with different mental skill, both because they enjoy them and because they are sure that their range of activities will help the way their brains work.
Gene Cohen, acting director of the same institute, suggests that people in their old age should engage in mental and physical activities individually as well as in groups. Cohen says that we are frequently advised to keep physically active as we age, but older people need to keep mentally active as well. Those who do are more likely to maintain their intellectual abilities and to be generally happier and better adjusted. "The point is, you need to do both," Cohen says. "Intellectual activity influences brain-cell health and size."
21. People who are cognitively healthy are those _____.
(A) who can remember large amounts of information (C) whose minds are alert and receptive
(B) who are highly intelligent (D) who are good at recognizing different sounds
22. According to Fozard’s argument people can make their brains work more efficiently by _____.
(A) constantly doing memory work (C) going through specific training
(B) taking part in various mental activities (D) making frequent adjustments
23. The findings of James and other scientists in their work _____.
(A) remain a theory to be further proved (C) have been challenged by many other experts
(B) have been generally accepted (D) are practiced by the researchers themselves
24. Older people are generally advised to _____.
(A) keep fit by going in for physical activities
(B) keep mentally active by challenging their brains