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Keys?: noise pollution loud music planes mobile phones building houses
air pollution factories smoking cars building houses
water pollution ships rubbish littering factories
III. Listening
1. 1b Listen and complete the sentences.
What was the problem?
The river was _____________. Even the bottom (底部) of the river was full of ________. There were no more ______ for fishermen (渔民) to catch.
What caused the problem?
People are throwing _______ into the river. Factories are putting ______ into the river.
How should the problem be solved?
We should write to the ____________ and ask them to ___________ the factories. Everyone should help to __________ the river.
Keys: really dirty rubbish fish litter waste government
close down clean up
2. Listen again and check (√) the sentences you hear.
IV. Practice
1. Role-play the conversation in 1c.
Mark: The river was dirty. Even the bottom of the river was full of rubbish.
Tony: But it used to be so clean!
Mark: Yes, but people are throwing litter into the river.
Tony: Everyone in this town should play a part in cleaning it up!
2. Make conversations using the pollution in 1a.
A: Factories are also putting waste into the river.
B: Yes, everyone in this town should play a part.
A: We should write to the government and ask them to close down the factories.
B: What else can we do?
A: Everyone should help to clean up the river.
V. Language points
litter 和 rubbish 都可指“垃圾”，用作不可数名词。
rubbish 指“没用的东西(被扔或将要丢弃的无用的东西)”不可回收。
litter 指“(室内或公共场所)乱扔的废物(纸屑、不要的包装纸、废瓶等)”还可回收