问题
选择题
It is very kind _____ you to help me with my lessons because it is very difficult _____me to learn them well.
A．of； for
B．of； of
C．for；of
D．for； for
答案
答案：A
考查句型：It is +形容词+介词+sb to do的用法。形容词为形容人的性格品质的词，应用介词of,形容词为difficult,necessary等词时，应用介词for 。所以选A。