假定英语课上老师要求同学们交换修改句子，请你修改你同桌写的以下句子。每个句子均有一处错误，错误涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧），并在其下面写上该加的词。
删除：把多余的词用斜线(＼)划掉。
修改：在错的词下划一横线，并在该词下面写上修改后的词。
71. It was the first time that I have visited the city.
72. Mother asked her son that he was satisfied with his room.
73. Most of the teenager like searching information on the Internet.
74. It was in the street which I met your father yesterday.
75. As far as I concerned, I can’t afford such an expensive car.
76. He is writing an English novel at the present.
77. I entire agree with what you said at yesterday’s meeting.
78. Our teacher said that the earth moved around the sun.
79. I have to get my car repair before I go to work.
80. It is no pleasure stay at home doing homework all day.