7. Ha Noi is an ancient city on which many customs are still on
8. Vu Quoc Viet, whose works i love very much, is a famous artist
9. Teacher's Day is a day when all the students show their gratitude to their teacher
10. QD, whose works are widely read all over the world, is a famous writer
11. Sa Pa, to which many visitors travel for their holiday, is a famous city
12. Easter is a festival when people will have a lot of fun
13. The river which flows through HCM City is the Saigon river
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23. C to have locked
24. A laughing
S couldn't help Ving
25. C to clean
26. A answering
avoid Ving
27. C making
28. C listening
29. C washing
30. D being
risk Ving
31. D working
carry on Ving
32. A to see
33. D writing
34. C to be
35. C applying
36. B to smoke
37. A seeing
38. A going
39. D going
40. C to cry
cause sb to Vnt
41. D drinking
42. B living
43. A to buy
44. D having stolen
45. A to take
46. C to lend
agree to Vnt
47. A how to drive