假定英语课上老师要求同桌之间交换修改作文，请你修改你同学写的以下作文。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。

Do you know when the ancient Olympic Games started? It is said that they start in 776 BC. Ever since then thousands of compete from all over the world have taken a part in them every four years for gold medals. Perhaps you have already known the five rings on the Olympic flag stand by the five continents.

Which is known to all , it is a great responsible for Beijing to be chosen to host the Olympic Games. To make the 2008 Beijing Olympic Games successful, a special village was built for the athletes to live. Nowadays, many Chinese people are fond of take exercise in order to keep fit and even more athletes are trying our best to reach the agreeing standard.