1. If I _________ his phone number, I would have called him yesterday.

2. _________ it not for your support, I wouldn't be where I am today.

3. You won't understand the lesson _________ you listen carefully to the teacher.

4. Had he _________ more attention, he would have noticed the error.

5. _________ you need any assistance, please dial 0 for the operator.

6. If she _________ late again, she will lose her job.

7. I _________ you if I had been in your position at that time.

8. _________ for the scholarship, I couldn't have gone to university.

9. If you _________ the light, you will be in the dark.

10. Were I _________ to choose again, I would still marry him.

11. If I _________ more money now, I would buy a bigger house.

12. Had the train _________ on time, we wouldn't have been late for the meeting.

13. Unless he _________ a map, he will get lost.

14. If they _________ the goal, they would have won the match.

15. _________ you see Jane, tell her I have a gift for her.

16. I will lend you my camera _________ you promise to be careful with it.

17. If he _________ his doctor's advice, he would be healthier now.

18. What _________ if you were the president of the country?

19. _________ for the loud noise, I would have slept better.

20. If I _________ enough time, I will finish this report today.

21. Should it _________ tomorrow, the outdoor concert will be cancelled.

22. If the firemen _________ so quickly, the house would have burnt down.

23. _________ I you, I would think about it once more.

24. You should take a sweater _________ it gets cold in the evening.

25. If I _________ his advice last year, I wouldn't be in this trouble now.