Answer:
Hello!
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1) The boy was beaten by the teacher rewritten in the active voice will be =
The teacher beat the boy.
2) They are painting the walls, rewritten in the passive voice will be, the walls----------- painted by them.
The walls are being painted by them.
3) The girls said, “______ are going nowhere”.
The girls said, They are going nowhere.
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Explanation: Hope this helped you!