Many trees are planted to stop the wind ( )blowing the earth away .填介词 呵呵请教下

On the moutains there are many chilren( ) trees.A.plant B.to plant C.planting D.are planting (09长沙) do you often plant trees in spring?Yes,many trees ( )in our school every year.A.plant B.planting c.are planted how many trees are How many trees did you plant last yesr?怎样回答?是There were 2.还是 There are 2 Many trees ___(plant) in our school yard these years.1.have been planted 2.are planted选哪个?为什么? There are many trees planted There are many trees on____ We always _____(plant) many trees on Tree Planting Day. Many trees _____(plant)in our school yard these years. How many trees--(plant) this year .讲为什么 we will plant many trees next year (变被动语态）many trees ( )( )( )next year They are going to____(plant) trees on the mountain tomorrow. going plant to you are tomorrow trees.(?)(连词成句) we are going to plant trees in the park are you going to plant trees next 快 how many new trees ________(plant)this year by the students of your school要说明原因 are planted have been planted 里选一个正确的 plant the trees还是plant trees they are going to plant trees on 2 years,中的plant 还有为什么等于grow