Ex 1. Choose the best words in brackets 1. Please let us know if the teacher................(will come, coming, comes, came) 2. If you.............to pass the exam, you should try harder. (wanted, want, will want, would want) 3. I.............. to Lan’s birthday if she invites me. (go, will go, went, are going) 4. They have to ask for their parents’ permission if they.........out after school. (go, will go, went, are going) 5. If Lan.............to lose some weight, she must do more exercises. (wanted, wants, want, will want) 6. If it....................tomorrow, we won’t go on a camping trip. (will rain, rains, rain, would rain) 7. If the teacher.............us some homework, we have to stay home and do it. (gives, give, will give, gave) 8. If they study hard, they................the final exam. (will pass, would pass, passing, passed) 9. If we recycle bottles and cans, we .......................a lot of natural resources.( save/will save/ saved/ saves) Ex 2: Put the verbs in the correct forms 1. If they (be) _________ students, they must wear uniform. 2. If we keep on using more and more motor vehicles, we (run out)__________ of oil. 3. We (not buy) ___________ this car if it is expensive. 4. We can’t play soccer well if it (rain)________ heavily. 5. She (be) _________ free tomorrow if she finishes all the homework. 6. If we (not take) _______ a map, we will lose our way. 7. If you throw trash everywhere, the environment (be) ________seriously polluted. 8. If she (not have) _________a bike, she can’t go on a picnic. 9. If he is absent now, He (not know) _________ what to do. 10.If the test is easy, I (do) _______ it in 10 minutes.