I don’t think it wise the hard work that they have refused to do.
A. of you taking on
B. for you to take on
C. of you to take on
D. for you taking on
网友回答
A. of you taking on
B. for you to take on
(答案→)C. of you to take on
D. for you taking on
解析：考查固定句型。It is +形容词+of/for sb. to do sth.当形容词指人时，用介词of，形容词指物时，用介词for。wise“明智的”，修饰人，用of；排除B、D。故选C。