Giải thích giúp e vs ajjjjjjjj

67. were doing
68. didn't know
69. Will - come
70. had built
71. have read
72. is climbing
73. doesn't like
74. are - talking
75. had finished
76. is repairing
77. has been
78. met
79. will go
80. were walking
81. doesn't play
82. Did - call
83. have already eaten
84. have learned 
85. had left
86. is knocking
87. studies
88. haven't traveled 
89. Is - doing
90. was watching