问题
It is very kind ______ you to help me with my lessonsbecause it is very difficult ______me to learn them well.
A:of; for
B:of; of
C:for; of
D:for; for
B:of; of
C:for; of
D:for; for
正确答案是：
同类题型
mous professor’s lectures, though ____ informal,are considered far more informative and interesting.
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_______ great fun it is to play computer games on _______ QQ!
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277. The policeman ________ the thief, caught him and took him to jail (prison).