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; 不填        D. 不填; a  

C  


解析:

 一份44個(gè)研究課題組成的調(diào)查顯示,故第一空選冠詞a;第二空 heart disease(心臟病)習(xí)慣上不用慣詞。  

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