1. The old woman was happy because she had won the lottery.
2. Tony went to bed late because he had been out with friends.
3. The ticher was tired because she/he had worked all evening correcting tests.
4. The boy was crying because he had sprained his ankle.
5. The dog was hungry because it hadn't eaten anything for days.
6. The man had an accident because he had fallen asleep while driving.
7. Jessica couldn't find her hat because she had forgotten where she had put it.