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12. You wouldn't complain, _?
A. won't you B. you wouldn't
C. shan't you D. would you

13. He used to work for the American Army during the War II, _?
A. used he B. usedn't he
C. didn't he D. aren't there

14. There is no beautiful park in Nam Dinh _?
A. is there B. isn't there
C. are there D. isn't nothing

15. Nothing is valuable for her _?
A. isn't it B. aren't they
C. is it D. shouldn't you

16. You're coming to the party, _?
A. aren't you B. isn't you
C. is it D. don't you

17. It wasn't very difficult, _?
A. wasn't it B. isn't it
C. was it D. was he

18. Tom is getting something for Sue, _?
A. wasn't he B. isn't he
C. will it D. aren't they

19. It won't be anything expensive, _?
A. won't it B. isn't it
C. will it D. isn't they

20. There's some milk in the refrigerator, _?
A. isn't there B. isn't it
C. wasn't it D. is there
```