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【题目】A study shows that eating one egg _______ day does not appear to raise ________ risk of heart attack.

A. the; a B. a; a

C. a; / D. a; the

【答案】D

【解析】句意:一项研究显示,每天吃一个鸡蛋并不会增加心脏病的危险。第一空用不定冠词a表示每一”;第二空用定冠词the,特指heart attack的危险。故选D。

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