Water which seems so simple and common is makes life possible.A. whatB. thatC. whichD.

问题补充：

Water, which seems so simple and common, is makes life possible.

A. what

B. that

C. which

D. how

答案：

(答案→)A. what

B. that

C. which

D. how

解析：考查表语从句：句意：看似简单普通的水，是使得生命可能的东西。Is后面是表语从句，表语从句缺少主语，用what。选A。