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It is very kind ____ you to help me with these maths problems because it is very difficult ____ me to work them out.
A.of; forB.of; of
C.for; ofD.for; for
答案:A
试题分析: 句意:你帮我学习这些数学难题你真是太好了,因为对于我来说做出来太困难了。此题考查it is +adj+of sb +to do sth某人做了某事,真是太好了和it is +adj+for sb+to do sth对于某人来说,做某事如何人怎么样,故选A。
考点:考查介词。