Playing organized sports is such a common experience in the United States that many childr

en and teenagers take them for granted. This is especially true 【B1】______ children from families and communities that have the resources needed to organize and 【B2】______ sports programs and make sure that there is easy 【B3】______ to participation opportunities. Children in low-income families and poor communities are 【B4】______ likely to take organized youth sports for granted because they often 【B5】______ the resources needed to pay for participation 【B6】______ , equipment, and transportation to practices and games 【B7】______ their communities do not have resources to build and 【B8】______ sports fields and facilities.

Organized youth sports 【B9】______ appeared during the early 20th century in the United States and other wealthy nations. They were originally developed 【B10】______ some educators and developmental experts 【B11】______ that the behavior. and character of children were 【B12】______ influenced by their social surroundings and everyday experiences. This 【B13】______ many people to believe that if you could organize the experiences of children in 【B14】______ ways, you could influence the kinds of adults that those children would become.

This belief that the social 【B15】______ influenced a person's overall development was very 【B16】______ to people interested in progress and reform. in the United States 【B17】______ the beginning of the 20th century. It caused them to think about 【B18】______ they might control the experiences of children to 【B19】______ responsible and productive adults. They believed strongly that democracy depended on responsibility and that a 【B20】______ capitalist economy depended on the productivity of workers.

【B1】

A．among

B．within

C．on

D．towards