It's very friendly__ him to help me when I 'm in trouble.A for B _英语解答

It's very friendly__ him to help me when I 'm in trouble.A for B to C of D with

人气：188 ℃　时间：2019-10-24 03:32:36

解答

C
friendly修饰的就是人,所以用of,若是修饰事件的则用for
It's difficult for him to learn English well.