Ответ:

1. Correct

2. Not Correct. The correct question tag is "shouldn't you?"

3. Not Correct. The correct question tag is "weren't we?"

4. Correct

5. Correct

6. Not Correct. The correct question tag is "are you?"

7. Correct

8. Not Correct. The correct question tag is "isn't he?"

9. C

10.D

11.D

12.C