I am sure___you said is true.答案是what,为什么不是that

I am sure___you said is true.答案是what,为什么不是that I am sure that what he said is true.是什么从句 为什么I think that it is true是附属简单分句,而What you have said is tru i am sure()he said is true.为什么中间用what引导. i believe what he said is true?A.that B.不填 为什么不能选择A? I am sorry for what I said 中的为什么用for而不是that?that后面不是接从句吗? If what you said was true that I am valuable to the company I am sure what I said is true这句话对吗 I know what you said is true. I think what you said is true “what i said is true”这里的what能否换成that?为何? what i said that is true!加标题一起翻译 谢谢