Question

voz pasiva de .... they study spanish
john cleaned the bathroom
the teacher closes the window

Answer 1

Spanish is studied by they
The bathroom was cleaned by John
The window is closed by the teacher

Answer 2

si lo que quieres es la traduccion aqui te la dejo:

 they study spanishjohn cleaned the bathroom
the teacher closes the window

traduccion:
estudian español John limpiar el baño el maestro se cierra la ventana