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

解析試題分析：考查虛擬語(yǔ)氣。句意：如果我前天不運(yùn)行這個(gè)程序，電腦就不會(huì)癱瘓了。根據(jù)the day before yesterday和后面的wouldn’t have broken, 可知假設(shè)條件與過(guò)去相反, 所以用過(guò)去完成時(shí)態(tài)。選C。
考點(diǎn)：考查虛擬語(yǔ)氣

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