18. Everyone is ready for the game, ________ ?
A. is it B. Isn’t he C. aren’t they D. is there
19. Overcrowded places have a lot of problems,________ ?
A. don’t they B. does it C. doesn’t it D. have they
20. People living in the slums never get good healthcare, ?
A. do they B. don’t they C. are they D. aren’t they
12. The schoolyard is very small, so there isn’t enough ________ for students to play in.
A. rooms B. land C. space D. ground
`text(18. aren’t they)`
`text(19. don’t they)`
`text(20. do they)`
`text(12. space)`
18. C. aren’t they
19. A. don’t they
20. A. do they ( có never->phủ định)
12. C. space (space: không gian)