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)