Did he clean the blackboard just now?改写成被动句

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Did he clean the blackboard just now?改写成被动句
Did he clean the blackboard just now?改写成被动句

Did he clean the blackboard just now?改写成被动句
Were the blackboard cleaned just now by him?

Was the blackboard cleaned(by him)just now?

Was the blackboard cleaned just now (by him)?