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-The accident might not have happened had we been more careful． -But we at that

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-The accident might not have happened had we been more careful． -But we at that

－The accident might not have happened had we been more careful．

－But we _____ at that time．

A．don’t           B．didn’t          C．hadn’t          D．weren’t

试题答案

D

标签：hadhappenedbeenwehave

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