短文改错。

     短文中共有10处语言错误，每句中最多两处错误。错误涉及一个单词的增加、删除或修改。

     增加：在此处加一个漏字符号(∧)，并在其下面写出增加的词;

     删除：把多余的词用斜线(＼)划掉;

     修改：在错的词下划一横线，并在其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（从十一处起）不计分。

a lake while suddenly I hear someone crying for help. I went up to see what was happening. I was shocking

to find a little child struggling in the water in the distance while many peoples were standing by without doing

anything. Without any hesitation, I had pushed through the crowd as I took off my coat, but jumped into the

water quickly. I managed to reach him and carried him back to safety. To his great relief, the kid was saved.

I was proud what I had done. I hope everyone can give a hand when someone else in need.

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通风与空调工程竣工的系统调试，应在建设和监理单位的共同参与下进行，施工企业应具有专业检测人员和符合有关标准规定的测试仪器。