71. What is the length of this river? (Hoặc: What is this river's length?)
72. We don't live near our school.
73. She went to France by plane last year
74. She can speak English to his teacher.
75. Don't forget to lock the door before you leave
76. Let's go to the zoo.
77. It is necessary to study English.
78. What a lovely dinner!
79. It's our duty to keep our school clean, green and attractive.
80. It takes him one hour to gert to work
* Xong nha

62. Minh is usually a hard worker
63. My brother is better at Math than me.
64. It will be impossible for them to come on Saturday.
65. Their father took a taxi to London last Monday.
66. When is your birthday?
67. Don't forget to do your homework.
68. Nam and Quang are the same age
69. It is too good to learn English.
70. We go to the school by bike every morning.
71. What is this river's length?
72. We don't live near our school.
73. She went to France by plane last year
74. She can speak English to his teacher.
75. Don't forget to lock the door before you leave
76. Let's go to the zoo.
77. It is necessary to study English.
78. What a lovely dinner!
79. It's our duty to keep our school clean, green and attractive.
80. It takes him one hour to gert to work
cho sao nhá

62. Minh is usually a hard worker
63. My brother is better at Math than me.
64. It will be impossible for them to come on Saturday.
65. Their father took a taxi to London last Monday.
66. When is your birthday?
67. Don't forget to do your homework.