You shouldnt have asked the boy to run across the street to buy cigarettes; he______by a p
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You shouldnt have asked the boy to run across the street to buy cigarettes; he______by a passing car.
A．may be knocked down
B．should have been knocked off
C．might have been knocked down
D．will have been knocked down
请帮忙给出正确答案和分析，谢谢！
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正确答案：C
虚拟语气题。mighthavedone意为“有可能发生某事”，表示对过去情况的推测，故[C]为正确答案。[A]表示对现在情况的推测；[B]表示“过去本应该做某事”，但事实上并未做；[D]是将来完成时，与题中时态不符，均可排除。