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  3. The news about vitamins keeps getting worse. Many studies published in the last few years shows that a variety of popular supple

The news about vitamins keeps getting worse. Many studies published in the last few years shows that a variety of popular supple

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问题     The news about vitamins keeps getting worse. Many studies published in the last few years shows that a variety of popular supplements don’t do anything to reduce the risk of developing heart disease, stroke or a variety of cancers.
    But what about multivitamins? These combination pills, which【C1】________10 to 30 vitamins and【C2】________, are the most popular supplements sold in America. A report published recently suggests they shouldn’t be.
    The study【C3】________161,808 participants in the Women’s Health Initiative, a long-term effort to【C4】________risk factors for cancer, heart disease and bone health in elderly women.【C5】________in the nationwide study included white, black, Asian and Native American women. They were followed for an average of nearly eight years.【C6】________, 41.5％ of study participants took some version of a multivitamin. Those women were more likely to be white and college-educated, live in the West, exercise and have a lower body mass index.
    However, women who took multivitamins weren’t any more likely to【C7】________a diagnosis of breast, lung, stomach, and other cancers than were women who didn’t take multivitamins. Nor were multivitamins in general helpful in【C8】________heart attacks, strokes or reducing the risk of death from any【C9】________during the study period. The research team did find one【C10】________benefit: The 3,741 women who took stress multivitamins—formulations【C11】________higher doses of several B vitamins along with an extra amount of vitamin C—were 25％ less likely to have a heart attack. No other correlations between vitamins and health outcomes were statistically【C12】________.
    The study provides【C13】________evidence that multivitamin use has little or no【C14】________on the risk of common cancers, heart disease or total mortality in elderly women.【C15】________, researchers wondered, "Why do millions of Americans use a daily multivitamin for【C16】________disease prevention when the supporting scientific data are weak?" Some physicians continue to【C17】________them for patients whose diets may have nutritional【C18】________. And since they don’t require a prescription, many people simply【C19】________they are safe. But those assumptions may not be【C20】________, especially if people wind up overdosing on vitamins and minerals, the researchers wrote.
【C17】
选项 A、preserve
B、approve
C、recommend
D、administer
答案C
解析 空格后代词them指代的是multivitamins。一般医生(physicians)会根据病人的饮食建议病人服用复合维生素。C项recommend“建议”符合语义要求。医生不会为病人“保存，保管”(A项preserve)、或“管理”(D项administer)复合维生素，此两项所表示的动作均不符合句子的逻辑要求。医生应该自己开处方，而无权去“批准”(B项approve)他人服用复合维生素，故B项代入后语义不符合常理。
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