1. in my opinion
2. had better
3. precious
4. gambling
5. serve the society
6. get into a good habit
7. realize
8. according to
9. legend
10. keep out
11. congratulate sb on sth
12. escape
13. organize
14. in the open air
15. on one hand, …on the other hand
16. in order to
17. solve the problem
18. entertainment
19. traffic jam
20. make good use of