-Oh, it's you!I ________ you．-I've just had my hair cut, and I'm wearing new glasses．A.didn't recognizeB.hadn't recognizedC.haven't recognizedD.don't recognize
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A解析本题考查的是时态问题，从对话情景来分析，“噢，是你呀，我还没认出你来。”显然这里“没认出来”是在说话之前的事。故应用过去时态，由于不表示过去的过去，就不能用过去完成时。