III. Choose the correct answer: 1. If we plant more trees, the air .. be so polluted. (wont / will / do / did) 2. If the river isnt , there is more fish. (water / clean / dirty / beautiful) 3. We can reuse . (water / air / noise / bottles) 4. What does reduce mean? (Using something again / Using something more / Using something less / Collect something) 5. What does reuse mean? (Using something again / Using something more / Using something less / Collect something) 6. We shouldnt rubbish on the street. (throw / reuse / wrap / turn off) 7. Polluted water can make fish .. (live / sleep / grow / die) 8. If you bring your lunch to school, you will .the food in a reusable box. (putting / puts / put / to put) 9. We can use empty to make pencil box. (paper / bottle / bulb / plastic bag. 10. Turn . the lights when we go out. (of / off / on / up)