Look at these pictures of our city.
看看这些关于我们城市的图片。
Is our city clean?
它干净吗？
No, it isn't.
不，不干净。
What makes our city dirty?
什么导致了我们的城市这么脏？
Smoke from cars makes the air dirty.
汽车尾气让空气脏了。
Black smoke from factories makes the air dirty too.
工厂里排出的黑烟也让空气脏了。
Rubbish makes the sreets messy and dirty.
垃圾使得街道又乱又脏。
The river is dirty.
河流很脏。
There's rubbish in the water and the fish are dead.
水里有垃圾，鱼儿都死了。
What can we do to keep our city clean?
我们能做些什么来保持城市的洁净呢？
We can take the bus and the metro to school.
我们可以乘坐公共汽车和地铁去学校。
We can walk to school too.
我们也可以走路去学校。
We can move some factories away from our city.
我们可以将一些工厂搬离城市。
We can put rubbish in the bin.
我们可以将垃圾扔在垃圾箱里。
We can plant more trees.
我们可以种更多的树。
They help keep the air clean.
它们能帮助保持空气的清新。
Your ideas are great. Well done, class!
你们的注意都很棒。做得好，同学们！
