it‘s important__ the pianowell. A. of him to play B.for him to piay C.of him playing 下面继续、
问题描述：
it‘s important__ the pianowell. A. of him to play B.for him to piay C.of him playing 下面继续、
D.for him playing
答
选B.it's important for sb.to do sth.对某人来说做某事很重要.