单项选择题

Since the road is wet this morning, ______ last night.

A．it must rain
B．it must be raining
C．it must have rained
D．it must have been rain
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单项选择题
Bob is ______ rude that everyone dislikes him.
A．so
B．too
C．very
D．such
单项选择题
Water always ______ steam when boiled.
A．gives out
B．gives up
C．gives off
D．gives in
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