No one doubts ______ he is the best leader in the company.

题目

No one doubts ______ he is the best leader in the company.
A）whether B) what
C) if D) that
选A,B,D为什么不可以

答案

Awhether经常与or not连用
B这是个宾语从句,不缺成分,不可以用what
D我记得doubt后面的句子要是想表达肯定的意思就用if,想表达怀疑的态度就用that