单项选择题

The purpose of new technologies is to make our life easier, ______it more diffi-cult.

A．not make
B．not to make
C．not making
D．do not make
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单项选择题
______the teacher's suggestion, Tom finally found a way to settle the problem.
A．Following
B．To follow
C．Follow
D．He followed
单项选择题
It is only when you nearly lose something______you will fully realize how much you value it.
A．before
B．that
C．do
D．will
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