Put the verbs in the correct tenses
1. If we (pollute) ................................ the water, we will have no water to use.
2. If we cut down trees in the forest, there (be)........................ big flood every year.
3. If he (not pass) .......................... the driving test, we(be) ...................................disappointed.
4. I (not write) ............................ to you if you (not send) ............................... me your address.
5. The sea (get) ......................... warmer if the earth (get) ................................warmer.
6. If we (not protect) .............................. the animals, they (kill)...........................
7. If Jane (not apologize) ........................... to us, we (not speak) ................................... to her.
8. If people (stop) ................................ using dynamite for fishing, a lot of sea creatures ( be) ................................ well preserved.
9. If he (study) ................................. hard, he could not fail the exam.
10.What …………. you ……….. if you ………….. in my position? (do/be)
11. We will go for a picnic if the weather (be) ................................ fine tomorrow.
12. If I were you, I (travel) .................................... around the world .
13. If there were flying saucers, there (be) ................................... traces of their landing.
14. Unless it (rain)....................................... , they will go shopping.
15. I would take photos of UFOs if I (see) .......................................... them
