III. Combine each pairs of these sentences, using IF : 1. Recycle and we’ll save natural resources. ……………………………………………………….. 2. Be careful or you will fall over the rocks. ……………………………………………………….. 3. Working too much can make you feel tired. ……………………………………………………… 4. Don’t be careless or you’ll break the vase. ………………………………………………………. 5. Ha can pass the exam, she has to work hard.……………………………………………………… 6. He can do a part to save the environment by buying recycled products. ………………………………………………………………………………………………………… 7. Putting garbage into the bins is one answer to minimize pollution. ………………………………………………………………………………………………………… 8. We should take the map with us or we will lose our way on the street. ………………………………………………………………………………………………………… 9. Ellen can borrow it, but she must give it back next week. ………………………………………………………………………………………………………… 10. The authorities are thinking of raising the petrol prices. I will have to cycle to work. …………………………………………………………………………………………………………