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.
【C20】

选项 A、syndrome
B、diagnosis
C、prescription
D、infection

答案D

解析 上下文语义题。空格处填入的名词被其后的分词短语introduced by...所修饰,由该修饰语可知,医生对加菲尔德总统用了没消毒的医疗设备。unclean treatment techniques暗示了致命的原因,由此语境推断他应该是受“感染”而丧命,A项infection“感染”符合语境。
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