Краткое пояснение: Вставим подходящие формы глагола to be (was, wasn't, were, weren't) в диалог, согласуя их с подлежащим по числу и времени.
George: The hotel was old.
Jan: No, it 1)
wasn't it 2)
was.
George: The rooms were small.
Jan: No, they 3)
weren't They really big!
George: The owner was Australian.
Jan: No, he 5)
wasn't He American!
George: The food was bad.
Jan: No, it 7)
wasn't it 8)
was great!
George: The weather was cold.
Jan: No, it 9)
wasn't It 10)
was really hot!
Ответ: was not / wasn't, was, weren't, was not / wasn't, was not / wasn't, was