That's [ ] I want to say most .

问题描述:

That's [ ] I want to say most .
A;all of B;all what C;for with D; right
必须有理由

B that's后面必须有个宾语成分,all就是宾语,all的内容用从句表示.what是say的宾语.但这句话还是怪怪的.