◎ 题干
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
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“It's important ______ the piano well.[ ]A. of him to playB. for him to playC. of him playingD. for him playing…”主要考查了你对  【it的用法】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。