学习视频

电子课本

Listen and say
It has no colour or shape. It has no smell or taste. We cannot see it, but we can feel it. It is everywhere.
它没有颜色和形状。它没有气味和味道。我们看不见，摸不着。它无处不在。
It is important to all people. It is also important to animals and plants. We all need it to keep us alive.
它对所有的人来说都很重要。它对动植物而言也很重要。我们都需要它来维持生命。
Look at the kite and the balloon. Look at the plane and the bird. They all need it too. It keeps them high in the sky.
看风筝和气球。看飞机和鸟。他们也都需要它。它使它们能飞在高空中。
What is it?
它是什么？

Say and act
1.What’s the matter, Kitty? Are you crying?
1.凯蒂，怎么了？你在哭吗？
I’m not crying. My eyes hurt. It’s the smoke.
我没有哭，我的眼睛受伤了，是烟伤的。
Where is the smoke from?
烟来自哪里？
It’s from the cars and buses.
它来自小汽车和公共汽车。
Look at the black smoke from the factory. It makes the air dirty.
看工厂冒出的黑烟，它使空气污劣。
Let’s go to the park, Ben. The air is clean there.
本，我们去公园吧，那儿的空气干净。
OK.
好的。
2.The air is so fresh here.
2.这儿的空气太清新了。
Yes. There are a lot of trees in the park. Trees keep the air clean.
是的，公园里有许多树，树保持空气洁净。
We should plant more trees and keep the air clean.
我们应该多种树，保持空气的洁净。
Yes! We should keep our city clean.
是的！我们应该保持城市整洁。

Learn the sounds
ch/tʃ/ – chair,China,rich,each
g/dʒ/ – giraffe,age,orange,danger
j/dʒ/ – job,juice,jam,jump
sh/ʃ/ – share,shirt,fish,brush
s/ʒ/ – usually,pleasure,television

Listen and circle.
1.We need to find a worker for this job.
2.Potatoes are cheap today.Let’s buy some.
3.Would you like some orange or apple juice?
4.Do you have a red shirt?
5.Please sit on this chair.
6.I usually go to the library on Monday afternoon.

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