1. it was mr david that saw I could also take part in the contest
2. it was I that didn't invite them
3. it was at that moment that i began to think about everything
4. it is his attitude toward people that really annoys me
5. it was I that didn't decide to postpone the match
6. it was the candidates that didn't start the trouble
7. it is the computer that gives me headache
8. it was on monday that my uncle came