单项选择题

Medical treatment varies greatly from state to state in this country, _____ is really confusing to me

A．this
B．it
C．that
D．which
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单项选择题
_____ is known to all, Lu Xun is one of the greatest writers in China.
A．It
B．That
C．As
D．Which
单项选择题
Now everything is clear and there is no point _____ the truth.
A．in denying
B．to deny
C．by denying
D．deny
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