单项选择题

He has never seen the Greens and he knows ______ about them.

A．little
B．a little
C．something
D．anything
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单项选择题
It is necessary that anyone ______ exercises every day if he wishes to keep healthy.
A．would do
B．will do
C．did
D．do
单项选择题
John's completely unaware how much damage he did the company, ______
A．didn't he
B．did he
C．isn't he
D．is he
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