短文改错（共10小题；每小题1分,满分10分）
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：在缺词处中加一个漏字符号（^），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。
Dear Li Ming,
To my opinion, when you reach London, the first place you should have set out for is Big Ben, where can be heard all over the world on BBC. Big Ben takes its name from Sir Benjamin Hall in 1858, who was responsible for the making of the world-famous clock at that time. It only has a very big size, but is extreme accurate as well. Officials from Greenwich Observatory have the clock check twice a day. On BBC, you can hear a clock when it is striking because microphones are connected to the clock tower. Big Ben has hardly gone wrong up till now. Once, therefore, it failed to give the correct time. A painter who worked on the tower hung a pot of paints on one of the hands and slowed it down!
Yours,
Mary