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If I _______ that program the day before yesterday, my computer wouldn’t have broken down.

A.didn’t run B.haven’t run C.hadn’t run D.were not to run

C

解析试题分析:考查虚拟语气。句意:如果我前天不运行这个程序,电脑就不会瘫痪了。根据the day before yesterday和后面的wouldn’t have broken, 可知假设条件与过去相反, 所以用过去完成时态。选C。
考点:考查虚拟语气

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