18. B
- Started + Ving.
19. C
- Suggest + Ving.
20. C
- Need + Ving : Cần được làm gì ( Bị động ).
21. B
- Want + to V .
22. D
- Interest in + Ving .
23. B
- Would you like + to V .
24. A
- Stop + Ving .
25. D
- Don't forget + to V.
26. B
- Refuse + to V.
27. B
- Enjoy + Ving.
28. A
- Agree + to V.