70. forty-five minutes are the maximum length of time allowed for the exam. Are->Is
71. Living expenses in this country, as well as in many others, are at an all-time high. Are->Is
72. The news on the radio and TV stations confirm that a serious storm is approaching our city. (hình như ko sai)
73. Every elementary school teacher have to take this examination. Have->has
74. A pairs of jeans were in the washing machine this morning.
75. Some of the movies about the creatures from outer space was surprisingly funny. Was->Were
76. After she had perused the material, the secretary decided that everything were in order. Were->was