Complete.
We should/shouldn't ...
1. ... save water and electricity.
2. ... recycle metal cans and glass.
3. ... reduce air pollution.
4. ... keep the air clean 5. ... recycle paper.
6. ... use public transport.
7. ... send smoke into the air.
8. ... turn off the water and light.

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вопрос

We should save water and electricity.We should recycle metal cans and glass.We should reduce air pollution.We should keep the air clean.We should recycle paper.We should use public transport.We shouldn't send smoke into the air.We should turn off the water and light when not in use.