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英语
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22.--- What ______ his parents doing --- _______ having lunch.A.is,He’s B.is,He C.are,They’re D.are,They
人气：374 ℃ 时间：2019-10-11 17:13:13
解答
C. 考察现在进行时的用法
现在进行时的结构是：be doing
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