Решение:
Выбираем подходящую форму глагола "to be" в прошедшем времени:
- She was my best friend.
- They were in the park last Tuesday.
- Were you at school yesterday?
- I saw the dog. It was very cute.
- We were students four years ago.
- My name is Jack. I was ten years old last year.
- He was a hockey player five years ago.
Ответ: was, were, Were, was, were, was, was.