Question

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  

Answer 1

C  

解析:

 一份44个研究课题组成的调查显示，故第一空选冠词a;第二空 heart disease（心脏病）习惯上不用惯词。