what happened to your MP4?it needs-------A to repair B repairing C repaired D being repairing

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what happened to your MP4?it needs-------A to repair B repairing C repaired D being repairing

B
need doing = need to be done
不明白的再问哟,请及时采纳,多谢!

B
祝你学习进步,更上一层楼! (*^__^*)
不明白的再问哟,请及时采纳,多谢!

B 主动表被动=to be repaired.
老师祝你学习进步!
望采纳,多谢!^_^