But for their help, we______the program in time.

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问题 But for their help, we______the program in time.

选项 A、can not finish
B、will not finish
C、had not finished
D、could not have finished

答案D

解析 but for表示“要不是”，否定形式用虚拟语气，主句表示与过去事实相反的情况，因此选D。

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中学英语

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