Unit13SectionA第一题答案
1. coal
2. ugly
3. plastic
4. advantage
5. crue.l
6. industry
7. laws
Unit13SectionA第二题答案
1. fisherman
2. methods
3. harmful
4. Littering
5.wooden
Unit13SectionA第三题答案
1. make a difference
2. take part in
3. turn off
4.pay for
5. play a part
6. take action .
Unit13SectionA第四题答案
1. Even the bottom of the river was full of rubbish.
2. Everyone in our town should play a pait in cleaning it up.
3. Have you (ever) taken part in an enwironmental project?
4. We can't afford to wait any longer to take action.
5. I think it's a good idea that you now should pay for plastic bags.
6. Our action can lead to a better future.

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