— John, how did your English exam go? — I thought I _____, but in fact I came in the t

— John, how did your English exam go?

— I thought I _____, but in fact I came in the top 10% in the class.

A. should have failed B. couldn’t have failed

C. might have failed D. mustn’t have failed

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— John, how did your English exam go? — I thought I _____, but in fact I came in the t

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