题目内容

If I _______ that program the day before yesterday, my computer wouldn’t have broken down.
A．didn’t runB．haven’t runC．hadn’t runD．were not to run
C

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。
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