1. B. attention ( a lot of + noun )

2. B. psychological ( adj and adj )

3. B. imagination ( adj + noun )

4. B. invention ( the + noun + of )

5. A. variety ( a variety of: sự đa dạng về )

6. D. punishment ( adj + noun )

7. B. official ( chính thức )

8. C. danger ( in danger of: đang trong tình trạng nguy hiểm )

9. C. carerfully ( tobe + adv + V3 )

10. D. marriage ( noun )

11. C. development ( adj + noun )

12. B. Researchers ( noun chỉ người )

13. A. popular ( tobe + adj )

14. A. attractive ( adj + noun )

15. D. different ( tobe + adj )

16. D. popular ( adj + noun )

17. C. dangerous ( adv + adj )

18. B. natural ( adj + noun )

19. B. exhausted ( to + adj )

20. A. special ( adj + noun )

21. A. communication ( means of + noun )

22. C. suggestions ( adj + noun )

23. A. impression ( adj + noun )

24. B. confident ( more + adj )

 - noun: danh từ

 - adj: tính từ

 - adv: trạng từ

`color(green)(1B.)` attention 

`color(green)(2B.)` psychological 

`color(green)(3B.)` imagination

`color(green)(4B.)` invention 

`color(green)(5A.)` variety 

`color(green)(6D.)` punishment 

`color(green)(7B.)` official 

`color(green)(8C.)` danger 

`color(green)(9C.)` carefully 

`color(green)(10D.)` marriage

`color(green)(11C.)` development 

`color(green)(12B.)` Researchers 

`color(green)(13A.)` popular 

`color(green)(14A.)` attractive

`color(green)(15D.)` different 

`color(green)(16D.)` popular 

`color(green)(17C.)` dangerous 

`color(green)(18B.)` natural 

`color(green)(19B.)` exhausted 

`color(green)(20A.)` special

`color(green)(21A.)` communication 

`color(green)(22C.)` suggestions 

`color(green)(23A.)` impression 

`color(green)(24B.)` confident