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1.The new technology,if ________ to agriculture,will be a great help to increase the grain output.(  )
A.applyingB.to applyC.appliedD.having applied

分析 这项新技术,如果被应用于农业,将对提高粮食产量有很大帮助.

解答 答案:C
此处用在if之后作条件状语,相当于if引导的条件状语从句;由于动词apply与其逻辑主语the new technology构成被动关系,故该从句应使用被动语态,即if the new technology is applied to agriculture;由于从句的主语与主句的主语一致,都是the new technology;并且从句的谓语动词中含有助动词be(is),因此此处可以省略主语the new technology 与助动词is,使用过去分词形式;故选C.

点评 做本题时,需要了解过去分词作条件状语,相当于if引导的条件状语从句的用法:如果状语从句的主语与主句的主语一致,而且状语从句的谓语中有助/系动词be,便可将状语从句中的主语连同be一同省略,用"连词+过去分词"作状语.

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