________ for two days, Jessica managed to finish her project ahead of time.A．To_刷题宝

题干

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

A．To work	B．Worked
C．To be working	D．Having worked

上一题下一题 0.85难度单项选择更新时间:2016-04-20 06:03:10

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