Ответ:

2. Is Jack good at geography?

Yes, he is.

3. Are you brilliant at maths?

Yes, I am.

4. Are you and your friends all thirteen?

No, we are not.

5. Are Annie and Mark brother and sister?

Yes, they are.

6. Are Sadie and Jack cousins?

No, they are not.

7. Is Manchester the capital of England?

No, it is not.

8. Is Buenos Aires the capital of Argentina?

Yes, it is.