假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。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（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1．每处错误及其修改均仅限一词；
2．只允许修改10处，多者（从第11处起）不计分。
Once, when l was a teenager, my father and l were standing in line to buy tickets for the circus. Finally, there was only one family among us and the ticket counter.
This family made deep impression on me. There were eight children, both probably under the age of twelve. You could tell they didn’t have a lot of money. Their clothes was not expensive, and they were clean. The children were well-behaved, all of us standing in line, two-by-two behind their parents, held hands. They were excitedly talking about the clowns, elephants and another performances where that they would see that night. Everyone could sense they have never been to the circus before.
71. among改为between 72. deep 前加a
73. both 改为all 74. was 改为were 75. and 改为but
76. us 改为them 77. held 改为holding 78. another 改为other
79. 去掉where 80. have 改为had
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