But for the metal cage to pull the miners to safety, the miners in Chile ____ in less than twenty-four hours.A.would not be rescuedB.would not have been rescuedC.would be rescuedD.would have been rescued
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B解析这题考查虚拟语气的用法：but for“要不是”，相当于：if it had not been for…,主句要用与过去相反的虚拟语气，would have done，要不是金属笼子拉矿工到安全地方，在智利的矿工不能在不到二十四小时内获救。选B。