单项选择题

I know the difference between these two words. So ______ they.

A．know
B．will
C．do
D．does
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单项选择题
The directors will meet tomorrow, ______the schedule is changed.
A．if
B．but
C．unless
D．or
单项选择题
With so many eyes ______on him, he was too nervous to speak.
A．fixed
B．fixing
C．to fix
D．being fixed
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