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12. Minh has a new bike,...................?
13. No one cheated in the exam,........................?
14. They haven't lived there long,..........................?
15. They won't be here,....................?
16. They haven't seen this film,.....................?
17. He had never seen you before ,......................?
18. There is a party tonight ,...................?
19. These cakes are delicious,.................?
20. You wouldn't tell any one about it ,......................?