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--- Has James finished his report on his Enquiry Learning yet?\
---- I’m not sure. He _____ on it last week.
A.was workingB.has workedC.workedD.had worked
A

试题分析:句意为:----James完成了他有关咨询式学习的报告了吗?  ----我也不知道,上周他一直在从事这个工作。has done现在完成时,过去发生的动作对现在造成的影响,句意中是没有此含义的,过去发生的动作一直持续到现在,题目中也没有此意,故可排除B;worked强调过去的动作,此题目表示的是过去的一周一直在做的事情;had done过去完成时,表示过去之过去,work这一动作没有发生在过去的动作之前。
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