单项选择题

Water power stations are built ______ there are big water falls.

A．in which
B．that
C．in that
D．where
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单项选择题
______ information, it can also store the information as fast as it is gathered.
A．Not only an electronic computer can gather
B．Not only can gather an electronic computer
C．Not only can an electronic computer gather
D．Not only gather an electronic computer
单项选择题
Were it not for television, we ______ things that are happening in other places.
A．can not see
B．will not see
C．could not see
D．did not see
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