短文改错（满分10分）
英语课上，老师要求同学相互修改作文。假设以下文章为你同桌所写，请你对其进行修改。文章中共有10处错误，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：在缺词处加一个漏词符号（∧），并在此符号下面写出该加的词。
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 so much road accidents every day, which are often caused by careless. So there are many rules that they help to make the road safe. Here are some rules what we ought to know. In Hong Kong traffic keeps to the left. Before cross the road, we must stop or look both sides. Look right, looking left and look right again. If the road is clearly, it is safe to cross the road. If we see small children or very old persons, or blind people waiting to cross the road, we could help them.