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  3. Many Americans have been feeding a baby aspirin once a day, believing it would protect them from a heart attack, a stroke, and e

Many Americans have been feeding a baby aspirin once a day, believing it would protect them from a heart attack, a stroke, and e

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问题     Many Americans have been feeding a baby aspirin once a day, believing it would protect them from a heart attack, a stroke, and even cancer. But several recent studies have 【C1】________this into question.
    One large-scale study【C2】________more than 19,000 healthy people ages 65 and older. Participants were【C3】________assigned to take either 100 mg of aspirin (slightly more than the 81 mg dose that【C4】________people take) or a placebo (a harmless substance given to a sick person【C5】________medicine, without telling them it is not real) every day for an average of 4.7 years.【C6】________did people in the aspirin group not【C7】________their risk of heart disease, dementia, or disability, but they were also more【C8】________to suffer from significant bleeding in the digestive tract or brain. And they were more likely to die【C9】________apparently because of an increased risk of【C10】________cancer.
    【C11】________, a trial of more than 12,500 people ages 55 and older【C12】________to have a moderate cardiovascular risk found no benefit to taking aspirin daily. In a study of more than 15,000 people with diabetes, a daily aspirin did【C13】________heart attacks and strokes, but it also【C14】________ major bleeding. And according to an analysis of data from more than 117,000 people,【C15】________ people needed larger doses of aspirin to help【C16】________their risk of heart attack, stroke, and cancer.
    The bottom line: Although there is good【C17】________that aspirin can help people who have already had or are at【C18】________risk for heart attacks or strokes, the drug’s【C19】________is not so clear for people, especially older people, with less risk.【C20】________your doctor before starting—or stopping—aspirin.
【C6】
选项 A、As though
B、If only
C、Even if
D、Not only
答案D
解析 本题空格处需要填入一个连词，需满足句意“服用阿司匹林的那组人……没有……患心脏病、痴呆或残疾的风险，而且他们也更________遭受消化道或脑部的严重出血”。由句意可知，本句是两个分句构成，后半句but并非表示转折，其后跟also构成连词短语but also“还，而且”，可判断前后句是并列关系，需要填一个符合并列逻辑关系的连词短语，四个选项中只有D项Not only“不仅，不但”符合本句的句意、逻辑关系，也可以和but also构成搭配，故为正确答案。A项As though意为“似乎，好像”；B项If only意为“只要，要是”；C项Even if意为“即使，纵然”，三个选项代入原文均不符合句意，故排除。
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