—Why did he say so?—Sorry I don’t understand he has said means.A. all whatB. what allC. a

问题补充：

—Why did he say so?

—Sorry, I don’t understand he has said means.

A. all what

B. what all

C. all that

D. that all

答案：

A. all what

(答案→)B. what all

C. all that

D. that all

解析：考查what引导的宾语从句：句意：--他为什么这么说？--对不起，我不理解他所有的话的含义。What引导的是宾语从句，宾语从句中all是主语，he has said是宾语从句修饰all，what做mean的宾语。选B。