1. I / write / you / bad situation / affect / lake / school.
2. As you know / lake / school / be beautiful.
3. However / it / become / polluted.
4. People / electricity / fish.
5. A lot / fish / die / float / water surface.
6. People / throw / rubbish / waste into / lake.
7. Now / bad smell / affect / school childreb's health.
8. What / you / think / polluted air?
9. Look forward to / hear / you / see / protection / environment / local authority.
10. Sincere / Long
Dear Mr.John
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