单项选择题

（）is known to the world, Mark Twain is a great American writer.

A．As
B．That
C．Who
D．Which

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单项选择题

We don ' t allow（）in the meeting room.

A．to smoke
B．smoked
C．smoking
D．to smoking

单项选择题

Is there any hope of（）the final exam

A．John to pass
B．John pass
C．passing John
D．John' s passing

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