51. to speak -> speaking
52. informations -> information (information là uncountable noun)
53. my -> mine
54. many -> much (time là uncountable noun)
55. three -> third
56. to
57. up (look up: tra từ điển)
58. after (name after: đc đặt tên theo..)
59. on (put on weight: tăng cân)
60. down (sound down: buồn)