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different types of sandstorms
the reasons for sandstorms
sandstorms in different cities
1b Listen to 1a and choose the best answer.
Focus on the main idea of the conversation when you listen for the first time.
√
Listen and answer the questions
1.What’s the weather like today ?
It’s bad. The wind is so strong .
2.What causes these sandstorms ?
People have cut down too many trees.
3.Do we still need to do something to protect the
environment ?
Yes, we do.
1c Read 1a and complete trees’ functions.
Trees can stop the wind from blowing the earth away.
A lot of water can be saved by forests.
They can also stop the water from washing the earth away.
Tree’s functions
Read 1a and try to find the important phrases and sentences.
Group work
somebody, someone, something, somewhere
anybody, anyone, anything, anywhere
none, nobody, nothing, nowhere
everybody, everyone, everything, everywhere
一般情况下用于________
一般情况下用于______________
表_____含义
可用于_________
Indefinite pronoun and adverb