2. 外语
  3. The clouds, which are formed after the eruption of the volcano, have______the sun and now it is as dark as night.

The clouds, which are formed after the eruption of the volcano, have______the sun and now it is as dark as night.

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问题 The clouds, which are formed after the eruption of the volcano, have______the sun and now it is as dark as night.
选项 A、blocked out
B、blocked in
C、blocked off
D、blocked up
答案A
解析 该题是词汇题，考查动词词组辨析。选项A中的block sth．out意思是“挡住(光线或声音)”，如：Black clouds blocked out the sun．乌云遮住了太阳。选项B中的block sth．in意思是“画(某物的)草图”，如：I have blocked in the shapes of the larger buildings．我勾画出了较大型建筑的轮廓。选项C中的block sth．off意思是“(用路障)封锁、堵塞”，如：The main roads of the city have been blocked off．城市的主要道路被封锁了。选项D中的block sth．up意思是“塞住、堵住(孔、洞)，”如：My nose is blocked up．我的鼻子堵塞了。因此，根据题意，选项A为最佳答案。
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