71. 1
72. At midnight
73. Because he lost his key
74. Twice
75. He spoke like a small child
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I.
76. To -> bỏ
77. Care -> carelessly
78. Will Ba -> Ba will
79. Happily -> happy
80. Students -> student
II.
81. What's wrong with this TV?
82. Hoa and Minh were absent from school yesterday because of illness
83. Nam can't swim as well as Binh
84. What is the width of the stadium?
85. We will have a Sa Pa tour that last for fives day, won't we?
86. Is that the best you can do?
87. Students don't have to wear uniforms on Wednesday
88. Watching TV makes she feel comfortable
89. It took us a whole day lto look for these old pictures
90. How far is it from your hometown to your school?
III.
91. There is a train leaving for Lao Cai at 5 o'clock every morning
92. It is about 300 km from HCm city to Phu Quoc island
93. Can we travel to Sa Pa by air?
94. If you are careful, you won't fall off your bicycle
95. Our teacher always drives carefully
96. Mr Tam used to go to work by car some years ago
97. Traffic rules should be obeyed strictly by road users
98. My mother used to wash clothes by hand in the past
