单项选择题

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

A．not make
B．not to make
C．not making
D．do not make
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单项选择题
—Nancy is not coming tonight. —But she______!
A．promises
B．promised
C．will promise
D．had promised
单项选择题
—Can I help you —Yes. I bought this radio here yesterday, but it______.
A．didn't work
B．won't work
C．can't work
D．doesn't work
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