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。

There are many different signs in the public. They tell you what to do or what not to do in a place. Do you know what they exact mean? For example, if you go to see a film, you should enter the cinema at the ENTRANCE and leave for the EXIT. You will either find NO SMOKING signs in many cinemas. If you visit a museum, don’t take some photos inside the halls. You are not allowed. You will find NO PHOTOS signs in many museum. When you drive a car, don’t park in a street without a NO PARKING sign. Making sure you understood the signs and you won’t get into any trouble.