此题要求改正所给短文中的错误。对标有题号的每一行做出判断
如无错误，在该行右边横线上画一个勾（√）；
如有错误（每行只有一个错误），则按下列情况改正:
此行多一词, 把多余的词用斜线（＼）划掉，在该行右边横线上写出该词，并用斜线划掉。
此行缺一个词, 在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。
此行错一个词, 在错的词下划一横线，在该行右边横线上写出改正后的词。
注意：原文没有错的不要改。
Sports and games do much good to our health．
They can make us strongly and keep us fit．Especially they can be of     __
very value to the people who work with their brains most of the           _____
day，for sports and games give people valuable practices in             ____
exercising the body．                                                   
Sports and games also very useful in character-training．                _____ 
They usually demand not only of physical skill and strength               _____
but also courage，discipline and teamwork．For boys and               _____
girls，which is learned on the playground often has a deep effect          _____
on their character．If each of them learned to work for his team      ____
and not for him on the football field，he will later find it            ____
natural to work for good of his country，instead of for only his       ___
benefit.