Question

Isn't it very kind ______ your parents to do that for us?

1. A.
   for
2. B.
   to
3. C.
   about
4. D.
   of

Answer 1

D
本题是固定用法的考查。It is+形容词+of/for+sb．+t0 do是固定的句型。但两个句型用法不同，如果形容词表示人的性质，如kind，nice等必须用of。