Ответ:

ответ на задание 2 а и б:

2) a) 1.mustn't

2.must

3.must

4.mustn't

5.mustn't

6.must

7.mustn't

8.mustn't

2) b) 1.if we don't pollute the rivers, fewer fish will die

2.if we use only unleaded petrol, we will reduce air pollution

3. If we recycle paper, glass, etc, we will save important resources

4. If we don't create so much rubbish, the planet will be cleaner

5. If we don't destroy rainforests, rare plants and animals will survive

6. If we protect wildlife, we will save endangered species

7. If we don't drop litter on beaches, beaches will be clean and safe

8. If we don't let factories pollute the air, the atmosphere will be cleaner