单项选择题

These machines ______ on sale the day after tomorrow.

A．are being put
B．are to put
C．will put
D．are to be put
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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
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
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