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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，每处错误仅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：在错的词下画一横线，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。
My cousin and I usually stay out late with some friends on Saturday evenings, left Grandpa alone at home. It was so cold yesterday, however, that none of us wanted to suffer from the frozen wind outside．So after dinner we stay at home sitting around a fire and listening to Grandpa tell his experiences in Second World War. In fact they sounded familiar to us, so we were still listening attentively so as to make him be happy. Now and then we asked Grandpa some questions, that he answered in a humorous way. We burst into laughing from time to time and he laughed too. Full of joy, we all felt especially warm in the cold evening．