2. 外语
  3. At the age of twelve, the human body is at its most vigorous. It has 【C1】_____to reach its full size and strength, and its owner

At the age of twelve, the human body is at its most vigorous. It has 【C1】_____to reach its full size and strength, and its owner

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问题     At the age of twelve, the human body is at its most vigorous. It has 【C1】_____to reach its full size and strength, and its owner his or her full intelligence; but at this age the 【C2】_____ of death is least.
    Earlier, we were infants and young children, and 【C3】_____ more vulnerable; later, we shall undergo a(n) 【C4】_____ loss of our vigour and resistance which, though imperceptible at first, will finally become so 【C5】_____ that we can live no longer, however well we look after ourselves, and however well society, and our doctors, look after us. This decline in vigour with the passing of time is called ageing.
    Normal people 【C6】_____ to forget this process unless and until they are 【C7】_____ of it. We are so familiar with the fact that man ages, 【C8】_____ people have for years assumed that the 【C9】_____ of losing vigour with time, of becoming more likely to die the older we get, was something 【C10】_____. Most animals we commonly observe in fact age as we do, 【C11】_____ given the chance to live long enough; and mechanical systems like a wound watch, or the sun, will 【C12】_____ energy someday. But these are not 【C13】_____ to what happens when man ages. A run-down watch is still a watch and can be 【C14】_____. An old watch, by 【C15】_____, becomes so worn and unreliable that it eventually is not worth mending. But a watch could never repair itself—it does not consist of 【C16】_____ parts, only of metal, which wears away by 【C17】_____.
    We could, at 【C18】_____, repair ourselves—well enough, at least, to 【C19】_____ all but the most instantly fatal illnesses and accidents. Between twelve and eighty we gradually lose this power, an illness which at twelve would knock us over, at eighty can knock us 【C20】_____ .
【C20】
选项 A、about
B、up
C、down
D、out
答案D
解析 考查动词短语的辨析。knock sb．about“反复打击或粗暴对待某人”；knock sb．up“敲门把……唤醒”；knock sb．down“(开车)把某人撞倒”，常用被动语态；knock sb．out“把……击昏；击倒；将……淘汰掉；使无用”。文章的意思是“能使我们在12岁时病倒的疾病，可能会使到了80岁时的我们丧命”。D可以暗指人类的衰老把人类击败(即致死)之义，符合文意，为正确答案。
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