单项选择题

It is very kind ______ you to help me with this problem.

A．for
B．of
C．to
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单项选择题
There are many trees on ______ side of the street.
A．both
B．either
C．every
单项选择题
—Would you mind my opening the window
A．Yes, please
B．No, not at all
C．No, I mind
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