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【题目】________ for two days, Jessica managed to finish her project ahead of time.

A. To work B. Worked

C. To be working D. Having worked

【答案】D

【解析】

试题分析:考查非谓语动词 句意:Jessica已经工作两天,他提前完成任务。两个句子共用一个主语JessicaJessica与work之间是主谓关系,且发生在主句之前,故选D项。

考点 : 考查非谓语动词

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