单项选择题

It won’t be long ______ the modern communications spread over all the villages in china.

A．when
B．before
C．until
D．as
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单项选择题
After the flood, no house in the village______.
A．left standing
B．was left to stand
C．remained standing
D．was remained stood
单项选择题
There are five pairs______, but I’mata loss which to buy.
A．to be chosen
B．to choose from
C．to choose
D．for choosing
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