Unit 4Unit 4Planting trees is good for usPlanting trees is good for us3.123.1212th Marchis TTree ree PPlanting lanting DDayay..植树节What should we do?What should we do?plant treesplant trees[plɑːnt] [plænt]种树种树What can trees do?air [eə]空气空气Trees can keep the air cleankeep us coolTrees can keep us cool.place [pleɪs]Trees can make the place beautiful.地方地方小组讨论：Trees can …ReportPlanting trees is good for us.Trees can…We should… Trees Planting Day in China is on 12th March. 在中国，植树节是 3 月 12 日。 12th March 3 月 12 日 , 为英语中对具体月，日的表达。 在英语中，月份开头第一个字母必须大写。（日期在前，月份在后） Planting more trees is good for us.植树对我们有好处。 be good for 对…有好处
