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at first, then, next, finally,…
Try to use some words to keep all the sentences connected, such as:
Although the sandstorm is really serious in some places , we can still do something to change the situation.
We can reduce cutting down trees and plant more trees.
Trees are very important for we human beings.
1b
Listen to 1a and check the correct answers.
According to 1a, the trees’ functions are _____.
Trees can keep us cool in summer.
Trees can stop the wind from blowing the earth away.
A lot of water can be saved by forests.
Trees can stop the water from washing the earth away.
Trees can provide us with clean air.
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Read 1a and answer the questions:
What’s the weather like?
What causes the sandstorms according to 1a?
What have we done to protect the environment?
The weather is bad.
People have cut down too many trees. As a result, a lot of rich land has changed into desert.
We have built “The Green Great Wall” to protect the environment.