such, so, it, make, to make, made ____ is not funny at all ____

such, so, it, make, to make, made
____ is not funny at all ____ fun of disabled man.
【正确答案】：It; to make
【题目解析】：【考点点击】本题考查It+be+ad.+to do sth.【要点透析】句中的It作形式主语,其真正主语是后面的不定式短语。本句意为:取笑残疾人并不好笑。