Unit 12 The EarthLead-inWhat things are there in the sky?Starsthe Moonthe EarthThe SunWhat things are there on the Earth?PeopleAnimalsWaterPlants…New wordsEarth地球part地区；区域forest森林land陆地ocean海洋rubbish垃圾sick生病的Listen and sayWe should stop cutting down so many trees.Ms Guo: Look at this picture. What is it? Kitty: It’s the Earth.Ms Guo: The green and brown parts are forests and land. What are the blue parts? Joe: I think they’re oceans.Ms Guo: Yes, they are. The Earth was very clean and beautiful in the past, but now some parts are dirty. Can we do anything to help the Earth? Alice: Yes. We should stop throwing rubbish into rivers. Peter: We should stop cutting down so many trees. Kitty: We should stop using plastic bags.Write the words in the boxes. Then talk about the Earth.forestslandoceansThe Earth was…and …in the past, but now some parts…We should stop…The Earth was very clean and beautiful in the past, but now some parts are dirty. We should stop throwing rubbish into rivers, cutting down so many trees and using plastic bags.Language points1. We should stop cutting down so many trees. 我们应该停止砍伐这么多的树。 stop 的意思是“停止”， stop doing sth. 的意思是“停止做某事”，表示停止正在做的事情。例句：停止讲话。老师进教室了。 Stop talking. The teacher comes in the classroom.注意： stop to do sth. 停下来去做某事 表示停下来，去做另外一件事情。例句：我们走了一个小时，累了。咱们停下来休息一下吧！ We walked for an hour and tired. Let’s stop to have a rest.Look and learnEarth地球forest森林ocean海洋land 陆地Look and readWe live on the Earth. The Earth is a beautiful place. There are rivers, oceans, land and forests. There are many different plants and animals too.我们居住在地球上。地球是一个美丽的地方，有...
