It was very kind_________ you to give up so much of time to help me.

It was very kind_________ you to give up so much of time to help me.

A. about

B. for

C. to

D. of
Xem đáp án
D là đáp án đúng
Lời giải:
Cấu trúc cố định: It was very kind of you to sth