Ответ:

2. Fill in the gaps with am, is, are, isn't or aren't.

  1. Lize in Year 7? No, she isn't.
  2. My sister is fifteen. She is sixteen.
  3. Their names are John and Paul. They are in primary school.
  4. Are you good at Maths? Yes, I am.
  5. Cathy and I are best friends, but we are in the same class.

Ответ: isn't; is, is; are, are; Are, am; are, are.