Ответ:

1. He isn't Japanese, is he?

2. They aren't going to watch TV, are they?

3. She plays tennis, doesn't she?

4. We're late, aren't we?

5. We need our phrase book, don't we?

6. They don't like sushi, do they?

7. They are traveling by plane, aren't they?

8. He bought an expensive TV-set, didn't he?

9. Terrible toothache, doesn't it?

10. She has read an interesting book, hasn't she?

11. I asked a foolish question, didn't I?

12. It will be a useful exercise, won't it?