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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.
【C1】
选项 A、prescribed
B、defined
C、declared
D、supervised
答案C
解析 空格后的that引导的宾语从句意为“……一天摄入七种蔬果或以上份量，患癌症的风险降低25％……”，而文章第一句表述了研究者发现“保持健康的关键是每天摄入七种蔬果”。两句主语一致，宾语部分意义重叠，因此本句为前一句的进一步阐述，故选C项declared“宣称”，以具体解释“发现”的内容。A项prescribed“开药方”，用于医生治病开处方时。B项defined“规定”一般用于上级或权威部门对某事的限制。D项supervised“监督，指导”用于行政监管和学术指导，不适用于本文语境。
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