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 It’s clever _____ her to work out _____ many difficult math problems.         

A. for; so              B. of; such               C. of; so              D. for; such

 It’s clever _____ her to work out _____ many difficult math problems.         

A. for; so              B. of; such               C. of; so              D. for; such

It’s clever _____ her to work out _____ many difficult math problems.

A. for, so               B. of, such         C. of, so              D. for, such