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  3. A British study found that B vitamins could reduce brain shrinkage in older people with mild memory loss. It showed that B vitam

A British study found that B vitamins could reduce brain shrinkage in older people with mild memory loss. It showed that B vitam

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问题     A British study found that B vitamins could reduce brain shrinkage in older people with mild memory loss. It showed that B vitamins caused an average one-third reduction in brain shrinkage among adults who had trouble in remembering.
    Retired Oxford University pharmacology (药理学) professor David Smith was a leader of the study. He praised the use of the vitamins as simple and safe. He also said researchers do not yet know if B vitamins could prevent or slow Alzheimer’s disease (阿尔茨海默病).
    Vitamins are important for good health. These complex organic substances help to carry out chemical changes within cells. If we do not get enough of the vitamins we need in our food, we are at risk of developing a number of diseases.
    Some shrinkage of the brain is thought to happen normally as people grow older. Yet studies have shown a link between a larger shrinkage and Alzheimer’s disease.
    The Oxford researchers say about one in six people over age seventy has problems with mental operations. They say half of these people develop serious loss of mental ability, as in Alzheimer’s disease. Over time, the disease robs people of their memories. Finally, it takes away their ability to care for themselves.
Tt is possible that as we grow older, our brains will________.
选项 A、make no change
B、shrink to some extent
C、develop greatly
D、disappear suddenly
答案B
解析 细节推断题。由题干中的grow older和brains定位到文章倒数第二段首句。定位句提到，大脑会随着人们的年龄增长而自然萎缩。因此，本题应当选B项“在某种程度上会萎缩”。A项“没有变化”、C项“急剧发育”和D项“突然消失”不符合文意。
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