–Why did he say so?--Sorry,I don’t understand ______ he has said mean.此处为什么what all

问题描述:

–Why did he say so?--Sorry,I don’t understand ______ he has said mean.
此处为什么what all

额~~
是不是答案错了啊
我觉得应该是what或者all that...

应该用what 吧或者all that

答案对的呀 是填what all
准确的说 应该是what all that 而that是可以省略的
understand后面引导的是宾语从句
楼主可以这样想 要是句末没有mean的话 则是填what 或 all(that)