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【单选题】

It is very kind ______ you to help me with my lessons. It is difficult ______ me to learn them well.
[ ]

A.
of, of
B.
for, of
C.
of, for
D.
for, for
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参考答案:
参考解析:
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举一反三

【单选题】一________?一Some red apples.[ ]

A.
What color are they
B.
What's on the table
C.
How do you like them
D.
Where is the fruit