题目内容：

短文改错

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，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（一），并在该词下面写出修改后的词。

注意：1.每处错误及修改均仅限一词； 2.只允许修改10处，多者(从第11处起)不计分

Life is not easy for any of us. We will unavoidably suffered bitterness and sadness from failure. Thus, there is very important for us to have a good mood in our daily life. If you have a good mood, you will be happy with everything in the world. Most important, you will have an optimistic effect at the people around you. We all will live harmonious and happy life. It is good for our health as well.

However, sometimes when you meet some difficulties, when you quarrel with others, but when you fail in doing nothing, you may have a bad mood. If so, you should get rid of it as soon as possibly. As we all know, every coin has two sides. So you should think more about its bright side. We are sure that everything will be better with time passed by. Remember: only you can make himself happy.