Who found the new world?改为被动语态

Who found the new world?改为被动语态 4.Who found the new world?被动语态 Who found the new world Who opened the door?改为被动语态. Who cleaned the classroom?改为被动语态 Who sings the song改为被动语态 Football____all over the world.(play)改为被动语态 The workers are making new cars 改为被动语态 Who has broken the window?改为被动语态 1.Who designed the CD_ROMs.(改为被动语态） who designs the CD-roms?（改为被动语态） Who helped you clean the room?（改为被动语态）