单项选择题

The strong storm ______ all the power lines in this region.

A．knock over
B．knock out
C．knock at
D．knock up
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单项选择题
If you happen to be in close encounter with a bear and do not have time to run away, you'd better ______ death.
A．simulate
B．mimic
C．stimulate
D．copy
单项选择题
At the same time, after what you have said, I do not feel ______ in deciding on this matter entirely by myself.
A．justifiable
B．justificative
C．just
D．justified
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