tìm lỗi sai 70. He promised to telephone though I have never heard from him again. A B C D 71. My big dog is perfectly harmful, and has never been known to attack anyone. A B C D 72. Near the park is a famous landmark calling the Unification Palace. A B C D 73. All Mike's friends felt sorry about him when he had to give up playing football. A B C D 74. We couldn’t find the man who car was blocking our driveway. A B C D 75. A large number of people was killed during the earthquake in China in May 2012. A B C D 76. The dentist gave me a check up and then telling me I needed two fillings. A B C D 77. He warned me to make an eye on my luggage as that place was full of thieves. A B C D 78. She asked me if I live in Hanoi. A B C D 79. If you work hard, you would get good marks. A B C D