题目内容：

阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式，并将答案填写在答题卡相应的位置上。

In the United States, there were 222 people _1._________ (report) to be billionaires (亿万富翁) in 2003. The _2._________ (rich) of these is Bill Gates, worth _3.__ least $ 41 billion, who made his money ___4.______ starting the company Microsoft. Mr. Gates was only 21 years old __5.__ he first helped to set up the company in 1976. He was a billionaire by the time he was6.__________, there are still some other people who have made lots of money at even __7._ (young) ages. Other young people who have struck it rich include Jackie Coogan and Shirley Temple. __8._ of these child actors made over a million dollars __9.__ (act) in movies before they were 14. But __10._______ youngest billionaire is Albert von Thurn und Taxis of Germany, who, in 2001, inherited (继承) a billion dollars when he turned 18!