II. Give the correct form of the verbs in brackets. (1 pt)

1. We’ll save thousands of trees if we (not waste) paper.                  => ____________________________

2. If there was no fresh water in the world, what (happen)?             => ____________________________

3. Most people (leave) before the storm struck the city.                     => ____________________________

4. A lot of rivers and lakes in this area (contaminate) every year.     => ____________________________