根据短文内容选择适当的单词，并用其正确形式填空，每个词限用一次。
| good, way, hurt, strong, child, make, each, dangerous, leaf, fill |
Man invented a lot of sports equipment. The first thing invented was the ball. Thousands of years ago,
in Egypt, the 1.
_favorite game was throwing stones.But a badly thrown stone could 2.
_ a child.
Looking for something less 3.
_ to throw, the people in Egypt 4.
_ the first balls.
At first, they used tree 5.
_____to make balls. They used vines ( 藤) to keep the leaves together. Later
they began to use pieces of animal skin to make balls and 6.
_ them with some light things. These balls
were much 7.
_ than the old one.
Before long they invented a lot of ball games, and 8.
_ had its own rules. They began to play these
ball games according to the rules. They thought that ball playing was one of the best 9.
_ to teach the
young men to be brave and 10.
_.