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

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

admin2010-03-19  16
问题 The strong storm ______ all the power lines in this region.
选项 A、knock over
B、knock out
C、knock at
D、knock up
答案B
解析 此题考查动词词组搭配。knock out意思是“敲空，破坏，使精疲力竭”；knock over意思是“打翻，搜查，吃掉”,knock at意思是“敲，击，敲打”；knock up意思是“(使)筋疲力尽，(使)累垮”。
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