Tree Planting Day,on 12th March,When is Tree Planting Day ,Its,plant trees,What should we do ,Unit 4,Planting trees is good for us,种植树木 对我们有好处,对.有好处,What can trees do ? 树木可以做什么呢,keep the air clean,Trees can,keep us cool,Trees can,make the place beautiful,Trees can,plant trees 种植树木,keep the air clean 保持空气干净,keep us cool 使我们凉爽,make the place beautiful 使这个地方漂亮,What are they doing ,They are planting trees,Its_today,My friends and I_,Trees can _,Yes,_,I lik
