假定英語課上老師要求同桌之間交換修改作文，請你修改你同桌的以下作文．文中共有10處語言錯誤，每句中最多有兩處，每處錯誤僅涉及一個單詞的增加，刪除或修改．
增加： 在缺詞處加一個漏字符號（^），并在其下面寫出該加的詞．
刪除：把多余的詞用斜線（\）劃掉．
修改： 在錯詞下劃一橫線，并在該詞下面寫出修改后的詞．
    In modern society， competition is everywhere． No wonder a English philosopher considers competition the source of a series of problem such as frustration and anxiety． Therefore， if we stress cooperation too much， there would be no progress． In my opinion， all are important and necessary．
    Let's take the competition at school for example． Even a gifted student won't make a remarkable progress if he is in a class without competition． That's because competition， and rather， challenge is a driving force made him go forward． On the other hand， if we don't cooperate with each other， it's impossible for us learn from each other． And that's why most of the great discoveries or inventions in the modern world are the result of cooperation．
    To conclude， those who laugh last are the people who can successful cope with the relationship between competition and cooperation．