Unit 7 Protect the earth (Story Time)1 .2 .3 .4 .Plastic pollution AnimalNwaterWenergyE treesTland( 土地)L air( 空气)APlastic pollutionp5 .plastic bags & plastic bottles6 . animalwaterenergy treesland( 土地) air( 空气)plastic pollution7 . animalwaterenergy treesland( 土地) air( 空气)plastic pollutionWhat problems are mentioned in the story?8 .Save( 节约 )waterSave energySave treesDont use too much plastic._ comes from trees. 听录音，说出四段文本标题各是什么 听录音，说出四段文本标题各是什么 ？ ？能源Energy comes from _ and _. Woodcoaloilcoal 煤oi
