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
______, he realized he made the right decision.
A．Before long
B．Long before
C．After
D．Before
单项选择题
For an instant the King stood as ______ and white as though the hand of death had reached out and touched his heart with its icy fingers.
A．tense
B．intense
C．tension
D．intensive
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