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问题:
问题描述:
初中英语Thestudent_theirclassroomwh
Thestudent_theirclassroomwhenthevisitorsarrived.A.havecleanedB.hadcleanedC.wascleanedD.havebeencleaned
芦婷婷回答:
B当来访者到来时,学生们已经打扫玩教室