单项选择题

Once ______ , this power station will supply all the neighboring towns and villages with electricity.

A．it being completed
B．it completed
C．completed
D．it completes
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单项选择题
I called at his house but was refused _________.
A．admission
B．access
C．reception
D．admittance
单项选择题
Such _________ the case, there are no grounds to justify your complaints.
A．was
B．is
C．is being
D．being
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