Have you already cleaned the classroom?不是这样填的__you___the claassroom___？。Have you let the classroom cleaned不对，是have you cleaned the classroom yet?哦哦还有一题i bought this MP4 player a month ago 改为同义句空呢i ______this MP4 player for a month.I have owned this player for a month噢噢噢谢谢你不客气的啦，快考试吧加油ok