7. Закончите следующие предложения, используя подсказку в скобках и страдательный залог.
1. Recycling: Glass, paper, cans and plastic (can/recycle)
2. Air pollution: Sulphur dioxide (should not/emit)
3. Car exhausts: Poisonous exhausts (should/ban)
4. Water pollution: Drinking water (must/purify)
5. Saving the rainforests: The rainforests (must/save)
6. The ozone layer: The CFC gases (should/stop)
7. Acid rain: Sulphur emissions from power stations (must/ reduce)
8. Safer energy: Nuclear power (can/made safer)