来自翟亮亮的问题
【Theoldmanhasplantedmanytreessincehecametolivehere．（改为被动语态）Manytrees______plantedbytheoldmansincehecametolivehere．】
The old man has planted many trees since he came to live here．（改为被动语态）
Many trees______planted by the old man since he came to live here．
