Ответ:
Краткое пояснение: Нужно вставить правильную форму глагола to be (am, is, are, isn't, aren't) в предложения.
- Are they here? - No, they aren't.
- This is my new backpack. It isn't not very light.
- We are in the classroom right now.
- Lisa and Mark are at the cinema.
- My brother is ten years old. He isn't twelve yet.
Ответ: