It’s not clever others’ homework.
A. for you copy
B. for you to copy
C. of you to copy
D. of you copying
网友回答
A. for you copy
B. for you to copy
(答案→)C. of you to copy
D. of you copying
解析：主语为动词不定式可用形式主语it来代替，真正的主语位于句尾用to do，be动词后的形容词表示人的个性特征通常用of来连接逻辑主语，故本题选C。