1.Have the birds fed by anybody?
2.The children must be taken care of by someone when we go out.
3.Ways have been found by them to make waste water clean.
4 These magazines mustn't be taken out of the room.
请及时采纳,不懂继续问( 天天在线 ）
1.Have the birds fed by anybody?
2.The children must be taken care of by someone when we go out.
3.Ways have been found by them to make waste water clean.
4 These magazines mustn't be taken out of the room.
请及时采纳,不懂继续问( 天天在线 ）