around the clock for two days.he managed to finish the report for the manager on schedule．A．Working B．WorkedC．Having worked D．To work 题目和参考答案——青夏教育精英家教网—

题目内容

_____around the clock for two days，he managed to finish the report for the manager on schedule．

A．Working B．Worked

C．Having worked D．To work

【解析】考查现在完成时时态，现在完成时表示的是过去发生的事对现在造成的影响。一般情况下有for two days，for+一段时间与现在完成时连用。句意：他已经日以继夜的工作了两天了，终于为经理成功地按时完成了报告。故选C。

考点：考查时态。

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