when did they make the model plane改被动句

when did they make the model plane改被动句 How did you make the model plane 改为被动语态 When did they invent the plane?改为被动语态. 把When did they finish the homework?改为被动句 How did you make the model piane 改为被动语态 i spent five hours make the model plane.同义句 when did they grow vegetable 被动句 are,now,the,plane,model,they,making 连词成句 they made the model plane with wood同义句 When did they make these cars?的被动语态及The policeman saw a thie When did the plane. Let's make a model plane.改为被动态?