1. It was not until he took the test _____ he realized how difficult the subject was.

2. _____ I need is a long holiday away from the city.

3. It was my brother _____ suggested we go to Italy for the summer.

4. _____ surprised me most was his complete lack of remorse.

5. It is the lack of funding _____ is causing the most problems for the school.

6. _____ he managed to escape from the prison remains a mystery.

7. It was only by chance _____ I found the missing keys in the garden.

8. _____ I enjoy most about my job is the opportunity to travel.

9. It was the CEO herself _____ made the final decision to close the branch.

10. _____ the government should do is lower the interest rates.

11. It was because of the rain _____ the football match was cancelled.

12. _____ much I like her, I can't overlook her constant lateness.

13. _____ simple it may seem, the task requires a lot of concentration.

14. _____ had I sat down than the doorbell rang.

15. _____ that he was exhausted, he still managed to finish the race.

16. It was in Paris _____ they first met during the spring of 1998.

17. _____ I want to know is why he didn't tell us the truth earlier.

18. It was her incredible voice _____ made her a worldwide star.

19. _____ the weather was bad, we decided to go for a hike anyway.

20. It was only yesterday _____ I finally heard from him after weeks of silence.

21. _____ I'm looking for is someone with experience in marketing.

22. It's the way he looks at me _____ makes me feel uncomfortable.

23. _____ difficult the climb, he was determined to reach the summit.

24. _____ I would love to help, I'm simply too busy at the moment.

25. It was the lack of sleep _____ was making him so irritable.