【題目】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:我本來能夠救這只可憐的兔子,但是我當時沒有對癥的藥。could have done本來能夠做而沒有做。

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