1. While I was in the library studying, I ………….. this fantastic book.

2. ……………. for my supervisor’s help, I could not have finished my Ph.D. dissertation.

3. After the storm …………….., many people were found miserable.

4. …………… your permission to leave the meeting a little earlier?

5. As is often the case with Jim, he ……… late again today.

6. ……………. I practice for many years, I cannot possibly reach my professor’s standard.

7. Do you get green or orange if you ……… yellow and blue?

8. I wonder whether ……… life on other planets.

9. They promised that they …………… us next week.

10. Jim’s salary is really low; ……………, he finds the job very rewarding.

11. The teacher told George …………….. his book.

12. I don’t know ……………. .

13. Students will receive extra credit ………….. they hand in their projects early.

14. …………… this seat for someone?

15. ……………. is your cousin? Is he an English teacher?

16. I could not run ……… since I was exhausted.

17. John’s car broke down on his way to work. ………………, he was late for the meeting.

18. It is almost impossible to get through to anybody because the storm last night …………….. the telephone lines in this area.

19. Please put your umbrella ……………… the door.

20. I must admit you ………, but I’m afraid my answer is still No.

21. How anyone managed …………….. without electricity is difficult to imagine.

22. I f I ……………… you, I wouldn’t risk it.

23. Our doctor advised us to have vaccinations ………….. we travel to that country.

24. I’ll make dinner …………… I come home.

25. If my cousin had waited another month, he could probably …………… a better price for his apartment.

26. The teacher warned Jim ……………. at his friend’s exam paper.

27. It is always a pleasure ……………. to you.

28. Nobody really knows …………….. started the fire.

29. I don’t know what time ……………… .

30. I can’t imagine ……………. going to rescue the passengers.