I thought necessary him to tell his father everything.A. it; ofB. that; forC. that; ofD.

I thought necessary him to tell his father everything.
A. it; of
B. that; for
C. that; of
D. it; for

A. it; ofB. that; forC. that; of(答案→)D. it; for解析：句意,为了他，我认为把一切都告诉他的父亲是有必要的。it是形式宾语，真正的宾语是后面的不定式，for 为了……,故选D。

我也是这个答案