18. A. who

19. A. forecast ( weather forecast: dự báo thời tiết )

20. B. between ( between..and.. )

21. C. had

22. C. happily

23. C. Therefore

24. B. often

25. B. unidentified ( không xác định )

26. D. were

27. B. invented

28. A. to improve

29. C. since ( since + 

30. B. more fluently

31. C. should work late

32. D. that

33. B. where

34. D. doesn't have to

35. D. correspond with ( trao đổi thư tín )

36. A. wear

37. A. do you

38. B. would go ( wish + would: ước muốn sẽ làm gì trong tương lai )

39. B. to come

40. A. although

41. C. was

42. B. in

43. B. isn't it

44. A. of ( afraid of: sợ )

45. C. has been

46. A. to come ( Would you like to - V )

47. B. be used

48. B. was destroyed ( câu bị động thì QKD )

49. D. always

50. D. when

51. A. could

52. D. if she liked pop music

53. C. hearing ( looking forward to + V-ing )

`color(blue)(18A.)` who

`color(blue)(19A.)` forecast 

`color(blue)(20B.)` between

`color(blue)(21C.)` had

`color(blue)(22C.)` happily

`color(blue)(23C.)` Therefore

`color(blue)(24B.)` often

`color(blue)(25B.)` unidentified 

`color(blue)(26D.)` were

`color(blue)(27B.)` invented

`color(blue)(28A.)` to improve

`color(blue)(29C.)` since 

`color(blue)(30B.)` more fluently

`color(blue)(31C.)` should work late

`color(blue)(32D.)` that

`color(blue)(33B.)` where

`color(blue)(34D.)` doesn't have to

`color(blue)(35D.)` correspond with 

`color(blue)(36A.)` wear

`color(blue)(37A.)` do you

`color(blue)(38B.)` would go

`color(blue)(39B.)` to come

`color(blue)(40A.)` although

`color(blue)(41C.)` was

`color(blue)(42B.)` in

`color(blue)(43B.)` isn't it

`color(blue)(44A.)` of 

`color(blue)(45C.)` has been

`color(blue)(46A.)` to come 

`color(blue)(47B.)` be used

`color(blue)(48B.)` was destroyed

`color(blue)(49D.)` always

`color(blue)(50D.)` when

`color(blue)(51A.)` could

`color(blue)(52D.)` if she liked pop music

`color(blue)(53C.)` hearing