短文改错。
文中共有10处语言错误，每句中最多两处。错误涉及一个单词的增加、删除或修改。
增加：在此处加一个漏字符号（∧），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：在错的词下划一个横线，并在其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10处，多者（从十一处起）不计分。
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 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 characters. 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 own benefit.
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