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1O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1O处，多者（从第11处起）不计分。
Union　is strength Whenever you're faced with difficulties or in a  dilemma ,cooperation plays an important part in getting you out of trouble
There was a time when I was too proud that I  overlooked my classmate . refusing to work together with them. Therefore .it was no doubt that I was left alone . suffering from loneliness and  failure. Unfortunately a teacher impressed on me the value of cooperation. From then  on ,I  learned to help others and turn to my friends for the help whenever I had difficulty finish a task  on my own. Surely cooperation made a great difference. Now I am getting well with my friend.
My experience has teach me that only if we attach  great importance with  cooperation can  we go beyond ourselves  As the saying go "United we stand ;divided we fall."