题目

帮忙把下面的英语句子改为被动句,
1has anybody fed the birds
2Someone must take care of the children when we go out
3They have found ways to make waste water clean
4you must not take these magazines out of the room

提问时间：2021-03-25

答案

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.
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