our home,Unit 4Planting trees is good for usPart A B D,Tree Planting Day,on 12th March,When is Tree Planting Day ,Its,plant trees,What should we do ,Tree Planting Day,We should plant more(更多) trees,keep the air clean,keep us cool,make the place beautiful,小组讨论：Planting trees can,Report,Planting trees is for us. Planting trees can Planting trees can Planting trees can We should,People cut down trees,Why do people cut down trees,Because,we want more,Farmers also need more to grow rice and vegetable
