Решение:
Используем was с единственным числом (I, he, she, it) и were с множественным числом (we, you, they).
- I was at the cinema yesterday.
- Lulu was at school on Monday.
- Larry and Lulu were at their grandparents' last Sunday.
- Chuckles was in the garden in the morning.
- Dad was at work in the afternoon.
- Nanny Shine was in the kitchen with the children.
- My Mum and Dad were at the theatre on Saturday.
- My friends were happy.
- My friends were in hospital last week.
- My little sister Betsy was in bed.
Ответ: 1. was, 2. was, 3. were, 4. was, 5. was, 6. was, 7. were, 8. were, 9. were, 10. was.