We should plant more trees to___ the soil___flowing away.人们应

We should plant more trees to___ the soil___flowing away.人们应 we should plant more trees ,and..then the We should plant more trees to make the air_____.(clean) why should we plant more trees? We should plant more trees and _________ the wild animals li We should plant more trees to make the air _____(clean). Jan We should plant more trees on ____ side of the street .A.eit We should plant more trees on ---side of the river.A.each B. 句型转换 We should plant more trees to protect the ea When should we plant the trees They (〉in spring. We should plant more trees and flowers around us . We should The more trees we plant,the______(good)our environment is.