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  

 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。