题目内容：

文中共有10处语言错误, 每句中最多有两处。每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。

Attention, please! I have a announcement to make. The voluntary activity is to be hold next Saturday. Those who are interesting in it can sign up in our office. Now let me to tell you how to get there.

Our office was at NO.66 Friendship Street. It is not very difficult to find your way here. You can take a NO.22 bus, the stop of whose is on the left of your university, get off at the second crossing. There is a cinema across the street. Turned right at the corner, and you will find Friendship Street. Our office building is 500 meters down the street on the right. I am sure you will have no trouble finding your office building.

For further informations, please contact Mr.Zhang.