The fact that smoking is harmful to health is most smokers admitA. whatB. whetherC. where

问题补充：

The fact that smoking is harmful to health is most smokers admit．

A. what

B. whether

C. where

D. that

答案：

(答案→)A. what

B. whether

C. where

D. that

解析：考察表语从句，且从句中缺少宾语，用what引导。