1. If she _ (study) harder last year, she _ (pass) the exam.
2. If you _ (mix) yellow and blue, you _ (get) green.
3. If I _ (be) you, I _ (apologise) to her.
4. If they _ (leave) earlier, they _ (catch) the train.
5. If it _ (rain) tomorrow, we _ (stay) at home.
6. Plants _ (die) if they _ (not/get) enough light.
7. If he _ (have) a car, he _ (drive) to work every day.
8. If you _ (not/take) the medicine yesterday, your cold _ (not/get) better.
9. If we _ (heat) ice, it _ (melt).
10. If she _ (know) the truth, she _ (tell) us.
11. If you _ (not/wear) a coat, you _ (catch) a cold.
12. If he _ (not/forget) his keys, he _ (not/lock) himself out.
13. Water _ (freeze) if the temperature _ (drop) below 0°C.
14. If I _ (win) the lottery, I _ (travel) around the world.