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．错误仅涉及一个单词的增加、删除或修改．增加：在缺词处加一
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（）划掉．
修改：在错的词面划一横线，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l0处，多者（从第11处起）不计分．
Dear Sir/Madam，
I am writing to express a complaint about the Metropolitan Museum．I am visiting the museum from 2：00to 5：00on yesterday afternoon．I would have enjoyed a perfect afternoon unless it had not been for an unfortunate incident．
I was in the Chinese Painting Section with its beautiful display of world famous works while suddenly I was astonished to smell cigarette smoke．I turned back and saw a young man smoke．I looked after an attendant but none．
You will agree that there should an attendant in every room and that the no-smoking rule should be firm carried out．I look forward to receive your reply at your convenient and hope for the solution to the matter．
Yours truly，
Johnson．