巩固强化二十三篇语法填空（每篇共10小题；每小题1.5分，满分15分）仔细阅读下面的短文，短文中有10个空格。请根据上下文填入适当的词语，或使用括号中的词语的适当形式完成语法填空，

巩固强化二十三篇
语法填空（每篇共10小题；每小题1.5分，满分15分）
仔细阅读下面的短文，短文中有10个空格。请根据上下文填入适当的词语，
或使用括号中的词语的适当形式完成语法填空，并将答案填写在相应的位置上。
In the United States, there were 222 people     1.     (report) to be billionaires(亿万富翁) in 2003.  The     2.     (wealth) of these is Bill Gates, worth at least $ 41 billion, who made his money     3.     starting the pany Microsoft. Mr. Gates was only 21 years old     4.     he first helped to set up the pany in 1976. He was a billionaire     5.     the time he was 31.
    6.    , 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 !           1. reported        2. wealthiest           3. by           4 .when       5. by