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。