2. 外语
  3. A loss B. steep C. by contrast D. undergo E. yet F. analogous G. likelihood H. do I. suffer J. acute K. decline L. already M. co

A loss B. steep C. by contrast D. undergo E. yet F. analogous G. likelihood H. do I. suffer J. acute K. decline L. already M. co

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问题 A loss B. steep C. by contrast D. undergo E. yet
F. analogous G. likelihood H. do I. suffer J. acute
K. decline L. already M. conquer N. overcome O. vulnerable
    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 consequently more【C3】______: later, we shall【C4】______ a progressive 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【C6】______ in vigour with the passing of time is called ageing.
    Most animals we commonly observe in fact age as we【C7】______, if given the chance to live long enough: and mechanical systems like a wound watch, or the sun, will run out of energy someday. But these are not【C8】______to what happens when man ages. A run-down watch is still a watch and can be rewound. An old watch,【C9】______, becomes so worn and unreliable that it eventually is not worth mending. But a watch could never repair itself—it does not consist of living parts, only of metal, which wears away by friction. We could, at one time, repair ourselves—well enough, at least, to【C10】______ 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 out.
【C5】
选项
答案B
解析 空格处在so…that“如此……以致……”结构中，因而此处填入一个形容词。上文指出，人的精力衰退是一个渐次的过程，起初难以察觉，暗指这种速度比较慢，然后逐渐演化成怎么精心照顾都无济于事，可见衰老的速度加快了。steep“急剧下降的”符合句意。acute指“情况严重，紧急”，一般指疾病等紧急情况。
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