=>
1. B structure : cấu trúc
2. A should be done/being exploited
3. C of
4. A recognition
5. A câu bị động
6. B It is said that
7. D fortress : pháo đài
8. B cannot be allowed
9. D should be equipped
10. C điêu khắc
11. B can be turned
12. C suggest Ving
13. D tháp
14. D will be employed