Looking at him,we found ______ hard to believe that he was well over seventy.
问题描述：
Looking at him,we found ______ hard to believe that he was well over seventy.
Looking at him,we found ___c___ hard to believe that he was well over seventy.
A．that B．/
C．it D．what
请问这题选什么．为什么?
答
选C
find it + adj. + to do sth.[发现做某事怎样]是个常用句型,其中"it"做形式宾语[注意：只能用it,不能用其它词.],不定式短语“to do sth.”才是真正宾语,即： it指代后面的to do sth.