71. I'd rather not make me annoyed by such silly questions.

72. It is a three-hours trip from Hai Phong to Ha Noi.

73. It is such an expensive book for me to buy.

74. We haven't gone to Da Nang since 10 years ago.

75. How long have you used this loptop?

76. This is the first time Nick has been to Viet Nam.

77. We spent five hours getting to Hai Phong.

78. Mr.Lam doesn't teach same subject as Mr.Hai

79. The match has been put off until the end of August.

80. I stayed up late last night as i wanted to finish my homework. 

Chúc bạn học tốt!

71. I'd rather you didn't make me annoyed by such silly questions

72. It is a three-hour trip from Hai Phong to Ha Noi

73. It is such an expensive book for me to buy

74. We haven't gone to Da Nang city for 10 years

75. How long have you started using this laptop?

76. This is the first time Nick has been to Vietnam

77. We spent 5 hours getting to Hai Phong

78. Mr.Lam doesn't teach the same subject as Mr.Hai

79. The match has been put at the end of August

80. I stayed up late last night so as to finish my homework