What is O level and A level?

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Tags

1. #abbreviation
2. #level
3. #students
4. #enter
5. #predominantly
6. #advanced
7. #advantages
8. #which
9. #education
10. #based
11. #ordinary
12. #other
13. #levels
14. #general
15. #evening
16. #certificate
17. #completing
18. #after