学习视频

电子课本

Listen and say
Look at this picture. What is it?
看这张图片，它是什么？
It’s the Earth.
是地球。
The green and brown parts are forests and land. What are the blue parts?
绿色和棕色的部分分别是森林和土地，蓝色的部分是什么？
I think they’re oceans.
我想是海洋。
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?
是的，它们是。过去的地球很干净漂亮，但是现在有些部分被污染了。我们可以做些事情拯救地球吗？
Yes. We should stop throwing rubbish into rivers.
是的，我们应该停止向河里扔垃圾。
We should stop cutting down so many trees.
我们应该停止砍伐这么多的树。
We should stop using plastic bags.
我们应该停止使用塑料袋子。

Look and read
We 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.
我们住在地球上。地球是一个美丽的地方。有河流、海洋、土地和森林。还有很多不同的植物和动物。
People. Plants and animals need clean water and air. Sometimes people throw rubbish into rivers and oceans. Sometimes people cut down too many trees. Smoke from cars and factories makes the air dirty. The Earth gets sick.
人、植物和动物都需要干净的水和空气。人们有时向河里和海里扔垃圾，有时砍倒很多的树。汽车和工厂排出的烟污染了空气。地球生病了。
Now people work together to keep the Earth clean and healthy. They pick up rubbish. They plant trees every year.
现在人们一起努力使地球恢复干净和健康。他们捡垃圾。他们每年都植树。
They recycle glass and paper. They bring their own shopping bags and stop using plastic bags.
他们回收玻璃制品和纸。他们携带自己的购物袋儿，不再使用塑料袋儿。

Review the sounds
sheep,ship
food,foot
bed,bad
water,what
father,brother
purple,paper
pig,big
piece,please
hat,bed
boats,beds
back,bag
rich,orange
leaf,leave
sure,pleasure
both,with
tree,dress

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