一、听录音,补全短文。
How to protect the Earth?
First, we shouldn't here or there. We should up rubbish and it in the bin.
Second, we use many plastic . Too much plastic is for our Earth.
Third, we should more trees. Trees can not only make our Earth , but also help the clean.

二、根据中文提示,补全句子。
1. Miss Wang and her students ______ ().
2. Let me ______ () first.
3. Billy and his friends ______ ().
4. We know ______ ().
5. Can you see ______ ()?

三、新情境 参观博物馆 游客们正在参观博物馆,请跟随讲解员的描述,完成海报填空,了解森林与河流对地球生态的重要意义。
Welcome to the Planet Earth Museum. You can learn some interesting things about the world.
Forests are home to the world's animals and plants. Trees keep the air clean and produce oxygen(产生氧气). We destroy(摧毁) about 50 playgrounds of forests every minute and throw away a lot of paper and wood every day. So, we need to use double-sided paper to save wood. Do not use disposable chopsticks(一次性筷子).
Rivers collect rainwater and transport(输送) it to the ocean. Along the way, plants clean the water, so we can drink it safely. The waste water from farms and factories pollutes rivers. People waste a lot of water too. There is not much water in many places. We should reuse water.
This is a green world. If we protect the environment, we can live a healthy and long life.
| Forests | Rivers |
| ·Home to the 1. and plants. ·Use 2. paper to save wood. ·3. use disposable chopsticks. | ·Collect rainwater and transport it to the ocean. ·4. water instead of(而不是) wasting water. ·5. water. |