第22题: [单项选择]In ______ review of 44 studies, American researchers found that men and women who ate six key foods daily cut the risk of ______ heart disease by 76%. A. a; the B. the; a C. a; / D. /; a 参考答案:C 答案解析:[考点] 冠词
[解析] review是可数名词,表示泛指要用不定冠词a。heart disease表示泛指不用冠词。