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18.We couldn't finish our work so early ________ your help.(  )
A.withoutB.withC.forD.by

分析 没有你的帮助,我们无法这么早完成工作.

解答 答案:A.
结合前面一句的"We couldn't finish our work so early"可以推断这句话表达的意思是"没有你的帮助,我们无法这么早完成工作.",所以设空处应选择一个否定意义的方式介词,结合选项 without 意为"没有",表否定,符合句意,故选A

点评 英语介词的一个特点是一词多义,并且介词间语义交叉现象很多,习惯用法也很多,有时很难从词义上区分开来.故学习中要注意不断总结,熟记一些介词和动词的固定搭配用法及习惯用法,是完成此类问题的捷径.

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