问题补充:
It is very kind you to help me with my work because it is very difficult me to do it by myself.
A. of; for
B. of; of
C. for;of
D. for; for
答案:
(答案→)A. of; for
B. of; of
C. for;of
D. for; for
解析:根据语境可知此题考查的是重点句型结构中介词的固定用法。It is kind of sb to do sth表示某人做某事真好;it is +形容词+for sb to do sth表示对某人来说做某事怎样,故选A。