题目内容

【题目】I __________ the poor rabbit, but I didn't have the right drugs with me at that moment.

A. saved

B. had saved

C. could save

D. could have saved

【答案】D

【解析】句意:我本来能够救这只可怜的兔子，但是我当时没有对症的药。could have done本来能够做而没有做。

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