It is true he said surprised us all.A. whatB. thatC. what thatD. that what

问题补充：

It is true he said surprised us all.

A. what

B. that

C. what that

D. that what

答案：

A. what

B. that

C. what that

(答案→)D. that what

解析：考查形式主语句。It是形式主语句，that引导起真正的主语从句，在句中不充当任何成分。What he said是主语从句中的主语，what在主语从句里做主语。