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

試題分析：考查虛擬語氣。句意：如果我前天不運行這個程序，電腦就不會癱瘓了。根據(jù)the day before yesterday和后面的wouldn’t have broken, 可知假設(shè)條件與過去相反, 所以用過去完成時態(tài)。選C。
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