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  3. Next time you feel the flu coming on, think twice before reaching for painkillers—they could do more【C1】______ than good. With t

Next time you feel the flu coming on, think twice before reaching for painkillers—they could do more【C1】______ than good. With t

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问题     Next time you feel the flu coming on, think twice before reaching for painkillers—they could do more【C1】______ than good. With the flu season【C2】______ way across Europe and North America, millions will be taking flu【C3】______, which commonly include painkillers. The general【C4】______ advice in the UK and the US is to take painkillers. But although painkillers can make you feel better they also lower fever, which can make the virus【C5】______.
    The first analysis of the effect of this on the【C6】______ shows that painkillers taken at current levels to【C7】______ fevers could cause 2,000 flu deaths each year in the US alone. Fever is thought to be a【C8】______ against viruses, because many viruses find it hard to【C9】______ above our normal 37 °C. Some studies have shown that lowering fever may【C10】______ virus-related infections and increase the amount of virus we can【C11】______ on to others.
    To find out what【C12】______ this might have on a flu epidemic, David Earn and his colleagues【C13】______ to a 1982 study which showed that ferrets, a【C14】______ animal model for human flu produced more【C15】______ flu virus if their fevers were lowered with painkillers. Earn’s team used these findings to estimate how much more virus people with【C16】______ flu might produce if their fevers were【C17】______.
    With the help of a mathematical model, Earn’s team【C18】______ their estimates to the number of people a year in the US who get flu,【C19】______ fever and take the drugs. They found that painkillers as used in the US could be increasing the【C20】______  of ordinary winter flu by up to 5 per cent.
【C10】
选项 A、prevent
B、protect
C、prolong
D、postpone
答案C
解析 空格所在句承接上文，援引一些研究解释退烧的副作用。空格处需填入谓语动词，本句主语是lowering fever，宾语是infections，下文提到“退热会导致病毒数量增加”，那么由病毒引发的感染势必加重，四个选项中C选项prolong“延长”符合语境，表示“感染持续时间延长，病情加重”。
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