【題目】________ 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】

試題分析：考查非謂語動詞 句意：Jessica已經(jīng)工作兩天，他提前完成任務(wù)。兩個句子共用一個主語Jessica，Jessica與work之間是主謂關(guān)系，且發(fā)生在主句之前，故選D項(xiàng)。

考點(diǎn) : 考查非謂語動詞

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