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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 當史密斯先生沿著馬路散步時遇到了他的一位老朋友.

解答 答案:C 句中while連接時間狀語從句;從句中省略了相同的主語和系動詞,即while he was walking along the road;故選C.

點評 省略句是英語的一種習慣用法.按照語法的分析,句子應該具備的成分,有時出于修辭上的需要,為了避免重復、突出新信息使上下文緊密連接的修辭手段.單詞,短語,分句,都可以省略.

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