sometimes he found ( ) very hard to work fo a long time because many visitors came to his home .A it B it's为什么
问题描述：
sometimes he found ( ) very hard to work fo a long time because many visitors came to his home .
A it B it's
为什么
答
it在这里做形式宾语，真正的宾语是后面的to work fo a long time ，very hard是宾补。
答
这是find+宾语+补语结构,it为宾语.
find后并非从句,若选it's则有find和is两个谓语