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  3. In April, British researchers at University College London found that, rather than the recommended five, seven daily portions of

In April, British researchers at University College London found that, rather than the recommended five, seven daily portions of

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问题     In April, British researchers at University College London found that, rather than the recommended five, seven daily portions of fresh fruit and vegetables were the key to health. They【C1】________that seven daily portions of fresh fruit and vegetables or more could reduce the risk of cancer by 25 percent and of heart disease by 31 percent,【C2】________to people who consumed less than one portion a day. The study was【C3】________the eating habits of more than 65,000 people in England【C4】________2001 and 2008.
    But a new study into the field of【C5】________eating says the famous five-a-day recommendation made by the UN’s World Health Organisation (WHO) in 2003 should be fine.
    Researchers in China and the United States went through 16 published investigations into diet and health【C6】________more than 830,000 participants, who were【C7】________for periods ranging from four and a half years to 26 years. Every additional daily serving of fruit and vegetables reduced the【C8】________risk of premature death from all【C9】________by five percent, the scientists found.【C10】________the period of the studies, 56,000 of the participants died, researchers said. In the case of death from a heart attack or a stroke, each additional serving【C11】________risk by four percent.
    【C12】________there was no evidence of an additional fall in risk beyond five portions, according to the【C13】________. published online Tuesday by the British Medical Journal (BMJ). "We found a threshold of around five servings a day of fruit and vegetables, after which the risk of death did not reduce【C14】________." said the investigators, led by Frank Hu of the Harvard School of Public Health in Boston, Massachusetts. High consumption of fruit and vegetable did not translate into a【C15】________reduction in the risk of death from cancer, the study also found.【C16】________advising patients about the【C17】________of healthy eating, doctors should also push home the message about risks from obesity, inactivity, smoking and【C18】________drinking, said the paper.
    The London researchers【C19】________to being surprised by what they found and【C20】________the results may not be applicable to other countries.
【C18】
选项 A、light
B、excessive
C、extra
D、suitable
答案B
解析 空格修饰drinking，且与obesity，inactivity，smoking(肥胖、缺少锻炼、吸烟)并列，是risks from(风险的源头)，故选B项excessive“过度的”，excessive drinking意为“过度饮酒，酗酒”。A项“少量的”，少量饮酒对健康危害不大。C项extra“额外的”，extra drinking不符合英语习惯表达。D项suitable“合适的”，为褒义词，不符合此处语境。
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