单项选择题

The road is wet, it ______ rained last night.

A．would have
B．should have
C．could have
D．must have
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单项选择题
We accept anybody regardless ______ nationality.
A．to
B．for
C．of
D．in
单项选择题
According to the passage, freedom can not be easily given since ______.
A．it is in not what workers care about
B．it has nothing to do with increasing productivity
C．freedom will do harm to the management
D．machines in modem factories must be organized in a fixed way
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