Решение:
- He was sleepy and felt like a snooze. (Past Simple от 'be' для 'He' - 'was').
- Did you see strange sea creatures in the underwater city? (Общий вопрос в Past Simple: 'Did' + подлежащее + инфинитив без 'to').
- Jules Verne lived in Nantes. (Past Simple от 'live' - 'lived').
- He created a lot of characters. (Past Simple от 'create' - 'created').
- Axel found an old knife. (Past Simple от 'find' - 'found').
Ответ: 1) was, 2) Did you see, 3) lived, 4) created, 5) found