问题
选择题
It is very kind ______ you to help me with my lessons. It is difficult ______ me to learn them well. [ ]
A. of, of
B. for, of
C. of, for
D. for, for
答案
答案：C
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It is very kind ______ you to help me with my lessons. It is difficult ______ me to learn them well. [ ]
A. of, of
B. for, of
C. of, for
D. for, for
答案：C