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—Who       tocleantheclassroomyesterday?  —LiMing.   A....
问题详情:—Who       tocleantheclassroomyesterday?  —LiMing.   A.helps   B.helped   C.ishelping   D.willhelp【回答】B。此题考查一般过去时态。根据句意:“谁昨天打扫了教室?李明”前半句...
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