单项选择题

The output of our factory is now twice,（）it was three years ago.

A．what
B．that
C．as
D．which

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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

单项选择题

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

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

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