When kids in parts of the world want to play, they often make soccer balls out of trash tied together with string. “____ the areas used for playing fields are often rough and rocky, millions of real balls go flat (变瘪)____ 24 hours,” says Tim Jahnigen, a California businessman. Determined to solve this problem,____ created an indestructible ball called the One World Futbol.

    The ball is made of ____ special material, ethylene-vinyl acetate foam. It's lightweight, it's flexible, and—____ important—it holds its shape.

    The One World Futbol needs no pump ____ won't wear out, even on rough surfaces. When tested,____ withstood (经受住) being crushed by a car, and even being chewed on by a lion.

    Although it costs more to produce ____ a typical soccer ball, Jahnigen estimates the One World Futbol can last 30 years. So far, it's been given to kids in 143 countries. 

地球上的物体和宇宙中的天体都是由物质组成的，物质处于不停的____ 和____ 之中；一切物质都是由____ 组成，分子是由____ 组成，原子由____ 和____组成．

食物中的三大供能物质是____ 、____ 、____ ，其中主要的供能物质是____ ．