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
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l1处起）不计分
Dear George，
It's been a week after we left your family and we are now back home．Thank you very much for showing them around your city and providing us for the wonderful meals．After we said goodbye to you，we went to Washington D．C．，where we stayed for three days．My brother was so much fond of the museums there that he begged my parents to staying another couple of day．However，my father had to return to work on Monday，and we fly back last Saturday afternoon．It was really a nice experience．If you'd like to make trip to our city some day，I will be better than happy to be your guide．
Yours，
Mike．
