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英语
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they bought a new bike the day before yesterday.一般疑问句
______they______a new bike the day before yesterday
人气：126 ℃ 时间：2019-08-20 23:11:13
解答
Did buy
因为bought 是动词过去式,句子是一般过去时,要借助助动词did.并且bought要还原.
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