单项选择题

Some parents are only concerned ______ their children's grades in studies.

A．of
B．at
C．about
D．for
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单项选择题
The followings are all correct responses to Do you mind my smoking here EXCEPT
A．No, do it please.
B．No, of course not.
C．I'm sorry.
D．Yes, go ahea
单项选择题
What does You cannot give him too much money mean
A．You shouldn't give him too much money.
B．The more money you give him, the better.
C．You can't give him a lot of money.
D．You ought to give him less money.
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