PHẦN BIỂN BÁO
1. C. the place in an airport where you get your cases and bags
2. A. Please keep a safe distance to prevent the spread of coronavirus
3. D. It is banned to swim in this pool
4. D. children aren't allowed
5. B. Do not litter
6. B. Way to get out in case of fire
7. D. keep out of children's reach
8. B. no matches
9. D. You mustn't drive after drinking
10. D. A and B are correct
11. D. B and C are correct
12. A. stop catching fish by electricity
13. C. this area is just for ... without permission
14. C. Railway crossing road ahead
15. D. camping area
16. A. slippery road
17. D. no cycling
18. C. construction
19. B. keep out of the grass
20. B. place for pedestrian crossing
