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：在错的词下画一横线，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。

On the 70th anniversary of our motherland, my classmates and I shoot a video to celebrate it. The video was consisted of solo performances. I was one of the solo singer, and I had practiced hard for it. Two girls designed the dance to enrich the video. Beside, our English teacher joined us, provided us with lots of help. The video’s success was true a team effort. Everyone taking part learned a great deal from it and determined work harder. Our country’s rapid development makes it possible of us to grow up with good living conditions. We will take on the responsibilities of contributing to your country.