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This problem may lead to more serious ones if _____ unsolved.

A.left

B.keeping

C.remained

D.making

 

【答案】

A

【解析】本題考查省略句的用法。此處完整的句子應(yīng)為:This problem may lead to more serious ones if it is left unsolved. 在從句中如果主語與主句的主語一致時(shí),常將從句的主語和謂語的一部分省略。

 

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