假如英语课上老师要求同学们交换修改作文，请你修改你同桌写的一篇作文。文中共有10处语言错误，要求你在错误的地方增加、删除或修改某个单词。
增加：在缺词处加一个漏字符号（∧），在其下面写上该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写上修改后的词。
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11处起）不记分。
Once a king asked an artist to paint a picture for him. He told the artist he didn’t want to any shadows in the picture, just sunshine, but the artist did so. When the king saw the finish picture, he was disappointed. Without shadows, everything in the picture looked flat and real. The point of the story was that we need both shadows and sunshine to have a completely picture, just as we need both rain and sun to have living world. People, too, need both sadness and happiness. We often learn important lesson during sad times. So when we feel sad, we should try to stop and think about that we might learn of the experience.