His plan was such a good one that we all agreed to accept it.

问题描述:

His plan was such a good one that we all agreed to accept it.
His plan was such a good one that we all agreed to accept it
His plan was such a good one as we all agreed to accept
两句子为何一个带it 一个不带it

第一个是同位语
第二个是定语从句“AS”作为连接词 相当于WHICH