阅读下面小短文，根据上下文语境，选择合适的单词填入空白处，每个单词只使用一次，每个方框里有一个是多余的词。

Sports play a very valuable role in children's lives. Children who in a sport will learn how to deal with failure, because even though they work hard to the skills needed for a sport, it doesn't mean they will always win. Besides, they also learn that there is no use in the games because the audience will see through it. Furthermore, taking part in sports is fun but not always easy, so it helps children learn how to deal with , something that everyone must learn to face in life.