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  3. American presidents seem to age before our eyes. But the common belief that high-office stress grays our leaders faster than【C1】

American presidents seem to age before our eyes. But the common belief that high-office stress grays our leaders faster than【C1】

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问题     American presidents seem to age before our eyes. But the common belief that high-office stress grays our leaders faster than【C1】______may be a myth, new research finds. In fact, the majority of American presidents have lived longer than【C2】______men of their times.
    That’s not to【C3】______that chronic stress has no effect on a person’s lifespan, but【C4】______does high social standing. The findings【C5】______a body of research linking high status to better health:【C6】______, Oscar winners live longer than those who were only【C7】______; and the long life effect is also seen in Nobel Prize winners.
    The new study, which was published in the Journal of the American Medical Association,【C8】______the dates of birth, inauguration and death of all 34 past presidents who died of natural causes. The【C9】______lifespan for these men should have been 68 years,【C10】______they’d aged twice as fast during their years in【C11】______as the popular wisdom suggests they do.
   【C12】______, the study found, these presidents lived an average 73 years. And indeed, 23 of the 34 presidents who died of natural causes lived longer than【C13】______, compared with other men their age during their lifetimes.
    Some presidents【C14】______an exceptionally long time: Gerald Ford died at 93.5 years, AND Ronald Reagan at 93.3. All【C15】______living presidents have already exceeded their life【C16】______, or are likely to do so.
    So why do people【C17】______the top of the hierarchy fare better than those below?【C18】______to wealth, education and the best health care of their times would seem to be obvious factors【C19】______medical attention seems to have actually killed President Garfield, who died from a fatal【C20】______introduced by his doctors’ unclean treatment techniques after he was shot by an assassin.
【C16】
选项 A、ceiling
B、extent
C、boundary
D、expectancy
答案D
解析 上下文语义题。上一段谈到总统的平均寿命为73岁，而该段主要谈论的是有些总统以及现任总统更长寿，根据这一语境，可断定此处exceed“超出”的对象应是“寿命”，D项expectancy“期待，期望”可和life构成常用短语life expectancy，表示“预期寿命”，符合句意。
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