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    精英家教网 > 高中英语 > 题目详情
    But for her help，we       the task in time．
    A．will not finishB．had not finished
    C．can not finish D．could not have finished
    D
    考查虚拟语气。句意：要不是她的帮助，我们不可能及时完成这项任务。“couldn’t+have+done”表示对过去事情的假设，意思是本来不能够做某事而做了。故选D。
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