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英语
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they didn't clean the classroom yesterday.the classroom ___ ___ yesterday.
改为被动语态!
人气：396 ℃ 时间：2019-10-19 05:27:13
解答
wasn't cleaned.首先根据yesterday确定是过去时态,所以be动词一定是was,加上否定词not,然后把clean改为过去分词就好.
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