单项选择题

The purpose of new technologies is to make life easier, ______ it more difficult.

A．not to make
B．not making
C．not make
D．do not make
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单项选择题
The most important question about the computer is ______ it has done and will do to man.
A．which
B．what
C．that
D．when
单项选择题
Some of the meat smelt bad before reaching the market and ______ away.
A．could be thrown
B．must throw
C．had to be thrown
D．should throw
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