It is very kind ____ you to help me with these maths problems because it is very difficult ____ me t...
2023-01-12 14:44:26 143次 2014-2015学年福建龙岩小池中学九年级上第三次教学质量监测英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
It is very kind ____ you to help me with these maths problems because it is very difficult ____ me to work them out.
A. of; for B. of; of
C. for; of D. for; for
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