this question is so difficult that none of us can answer it使两句意思基本一致this is _____ _____ _____ question that none of us can answer it

this question is so difficult that none of us can answer it使两句意思基本一致this is _____ _____ _____ question that none of us can answer it
this question is so difficult that none of us can answer it
使两句意思基本一致
this is _____ _____ _____ question that none of us can answer it

this question is so difficult that none of us can answer it使两句意思基本一致this is _____ _____ _____ question that none of us can answer it
this is (such a difficult) question that none of us can answer it
这主要是区别 such 和 so