1. Greeted

2. To behave in a polite or friendly way towards someone when you meet them

3. e

4. Assistant

5. Someone whose job is to help another person do their job

6. e.g. a junior officer helping a senior officer to do his work

7. Quarters

8. Rooms or buildings for people to live in

9. e

10. e

11. Constant

12. Continuous / never ending / always available

13. e.g. time

14. Master

15. To learn something thoroughly so that you know it or can do it very well

16. e.g. learning to fly a plane or use a gun correctly

17. Exhausted

18. Extremely tired and without enough energy to do anything else

19. e.g. just like Hasan in class everyday 

20. Consequently

21. As a result of this … / because of this …