Women drink more than two cups of coffee a day have a greater chance of having heart dis

问题补充：

Women drink more than two cups of coffee a day have a greater chance of having heart disease than those don’t.

A. who; 不填

B. 不填; who

C. who; who

D. 不填; 不填

答案：

A. who; 不填

B. 不填; who

(答案→)C. who; who

D. 不填; 不填

解析：两空均填who，引导定语从句。由于两个who在定语从句都是用作主语，所以不能省略。