помогите я не разумею

1. you are busy now, aren't you?

2. Kate was born in Kiev, wasn't she?

3. There aren't many people in the library now, are there?

4. He couldn't go there, could he?

5. You haven't heard about him for a long time, have you?

6. She knows you, doesn't she?

7. I am very old, am not I?

8. Sam will be back early today, won't he?

9. That is my dog, isn't it?

10. Pupils have read a lot of books, haven't they?

11. My son didn't see his friend, did he?

12. Granny spent a lot of time on it, didn't she?

13. They won't help anyone, will they?

14. There is no chair in the room, is there?