But for their help, we ____ the program in time．
A．can not finishB．will not finish
C．had not finishedD．could not have finished
D
考查虛擬語氣。But for“要不是......”，相當(dāng)于if虛擬條件句，與過去事實(shí)相反，主句用would/should/could have done。句意“要不是他們的幫助，我們不可能及時(shí)完成計(jì)劃�！惫蔬xD。
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