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  3. Lately it has become popular to reject the advice of drinking eight glasses of water a day as a medical myth. Books and medical-

Lately it has become popular to reject the advice of drinking eight glasses of water a day as a medical myth. Books and medical-

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问题     Lately it has become popular to reject the advice of drinking eight glasses of water a day as a medical myth. Books and medical-journal articles have declared there’s no scientific evidence for the【C1】______that " drinking eight glasses of water a day" can bring a wide【C2】______of benefits, from speeding weight loss to helping to【C3】______the body of toxins (毒素), fighting【C4】______and dry skin and hastening【C5】______from colds and the flu.
    It’s really more a dispute【C6】______perspective. Many studies have linked drinking extra water【C7】______health, but critics generally【C8】______them as statistically insignificant, and not widely【C9】______. An editorial in the Journal of the American Society of Nephrology in April【C10】______off small studies suggesting that water increases calorie burning, and increases blood flow to the skin. But, it added, we【C11】______there is also no clear evidence of lack of benefits. Experts also agree that people’s water needs vary【C12】______; you’ll need more if you’re playing in the U. S. Open than if you’re sitting at a computer in an air-conditioned office. But most nephrologists (肾病学家) say that thirst alone is a perfectly【C13】______guide to how much you need. Thirst is one of the most powerful human【C14】______factors, says Dr. Goldfarb, a kidney (肾) specialist at the University of Pennsylvania Health System. He also disputes the notion that drinking extra water improves the【C15】______of various organs—because it doesn’t【C16】______around. You don’t【C17】______those eight glasses of water. They’re in the toilet, he says, noting that the body has a(an)【C18】______system of self-regulation.
    Some boosters,【C19】______, say they have all the evidence they need. When I’m drinking a lot of water during the day, I feel better, and I’m less【C20】______to get a headache, says Theo Robbins, a Manhattan lawyer.
【C12】
选项 A、especially
B、respectively
C、considerably
D、approximately
答案C
解析 副词辨义题。后文将U．S．Open和air-conditioned office进行对比，可知不同环境下对水的需求不同，故句意为“专家们也认为，人体对水的需求有很大差别”，considerably“相当地，非常”符合题意。espe—cially“特别，尤其，格外”；respectively“分别地，各自地”；approximately“大约，近似地”，均与题意不符，故排除。
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