3. Was or were?

Решение:

Выбираем правильную форму глагола 'to be' в прошедшем времени.

1. I was
2. He was
3. They were
4. We were
5. She was
6. It was
7. You were
8. He and I were
9. My dog was

Ответ: was, was, were, were, was, was, were, were, was.