单项选择题

It is well known that ______ doctors are badly needed in the hospital.

A．a
B．an
C．the
D．×
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单项选择题
It's a long time since he left his hometown, ______
A．didn't he
B．hadn't he
C．wasn't it
D．isn't it
单项选择题
—It takes me just twenty minutes to reach the city from here. —Do you really drive ______
A．as fast
B．that fast
C．with such fastness
D．fast like that
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