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    精英家教网 > 高中英语 > 题目详情

    As it turned out to be a problem of no importance , we     so much time looking into it .

    A．needn’t spendB．didn’t have to spend
    C．needn’t have spentD．oughtn’t to spend

    C

    解析试题分析：句意：因为结果证明这是个不重要的问题，我们本不必花这么多的时间调查它。从这句话的一般过去时态，可以判断AD是错的，B项是过去不必做，是表示事实，而这里表示的是虚拟语气，本不必做而做了，用needn’t have done，选C。
    考点：考查情态动词的虚拟语气

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