they cleaned the classroom yesterday afternoon,( )完成反意疑问句

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theycleanedtheclassroomyesterdayafternoon,()完成反意疑问句theycleanedtheclassroomyesterdayafternoon,()完成反意疑

they cleaned the classroom yesterday afternoon,( )完成反意疑问句
they cleaned the classroom yesterday afternoon,( )完成反意疑问句

they cleaned the classroom yesterday afternoon,( )完成反意疑问句
didn't they?