We will never forget what happend ( )the afternoon of May 12,2008 A.in B.by C.at D.on 讲明原因

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We will never forget what happend ( )the afternoon of May 12,2008 A.in B.by C.at D.on 讲明原因

D 具体某一天(上午/下午/晚上)用ON

是用at吧选c