Ответ:
- It was Vicky's tenth birthday.
- She was in the garden.
- Her friends were in the garden too.
- The day was nice.
- The trees were green.
- Her mother and father were in the house.
- We were in the park.
- I was at home.
Чтобы правильно вставить was или were, нужно определить число существительного (единственное или множественное). С единственным числом используется was, с множественным — were.
Ты молодец! У тебя всё получится!