That is very kind ___you. I know it is very hard____ you to do that.
A.of ,for
B.for, of
C.for, for
D.of ,of
正确答案是A
That is very kind ___you. I know it is very hard____ you to do that.
A.of ,for
B.for, of
C.for, for
D.of ,of
正确答案是A