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12.While________ along the road,Mr.Smith met an old friend of his.(  )
A.walkedB.he is walkingC.walkingD.is walking

分析 当史密斯先生沿着马路散步时遇到了他的一位老朋友.

解答 答案:C 句中while连接时间状语从句;从句中省略了相同的主语和系动词,即while he was walking along the road;故选C.

点评 省略句是英语的一种习惯用法.按照语法的分析,句子应该具备的成分,有时出于修辞上的需要,为了避免重复、突出新信息使上下文紧密连接的修辞手段.单词,短语,分句,都可以省略.

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