问题
选择题
We all know that it is very kind ______ him ______ us. [ ]
A. for…to help
B. of…to help
C. for…helping
D. of…helps
答案
答案：B
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We all know that it is very kind ______ him ______ us. [ ]
A. for…to help
B. of…to help
C. for…helping
D. of…helps
答案：B