Решение:
- He had breakfast with his family. He went to the supermarket.
Обоснование:
- Глагол "have" в Past Simple имеет форму "had".
- Глагол "go" в Past Simple имеет форму "went".
- Логичным продолжением после завтрака может быть поход в магазин (supermarket) или другое место.
Ответ: He had breakfast with his family. He went to the supermarket.