I find ( )easy to answer the question.填 it 还是 it’s

I find ( )easy to answer the question.填 it 还是 it's

I find it easy to answer the question.
这里 it 是形式主语,真主语是动词不定式短语 to answer the question.又因为觉得某事/某物怎样的句型是find something+ adj.所以这里应该用代词it.
若要用it’s 句子应该改为
I find that it is easy to answer the question.
这里it 依然是形式主语代替动词不定式,不过整个句子句型变成了 find that+宾语从句.