we often plant trees in spring怎么变被动语态

we often plant trees in spring怎么变被动语态 we plant trees every we plant trees every we plant trees every people often plant trees in winter Trees _____ often _____ [plant] in spring we plant trees in May.12th we began to plant trees ________ ourselves We will plant another ten trees this afternoon.We will plant ___ ___ trees this afternoon when do people often plant trees?改为被动语态 We can plant trees in spring.对plant trees提问,怎么提? where shall we piant pine trees?we shall plant some We promise that we will plant more trees.(意思相同)We promise ______ _____ more trees. We always _____(plant) many trees on Tree Planting Day. we must plant more trees to ____ our planet greener. We plan to plant trees in one row.怎么翻译 The more trees we plant,the______(good)our environment is. we plant trees ( )March 12th中间填什么介词