It’s important the piano well.A. of him to playB. for him to playC. of him playingD. for h

问题补充：

It’s important the piano well.

A. of him to play

B. for him to play

C. of him playing

D. for him playing

答案：

A. of him to play

(答案→)B. for him to play

C. of him playing

D. for him playing

解析：句意：对于他来说弹好钢琴是重要的。Itis +形容词 + of/for sb. +to do sth.如果句型中的形容词用来形容人的,就用of, 说明to do sth就用for。根据中形容词指的是弹钢琴，故选B。