In the United States, there were 222 people ______（report） to be billionaires（亿万富翁） in 2003．The _______（rich） of these is Bill Gates, worth at least $ 41 billion, ______made his money ________ starting the company Microsoft．Mr．Gates was only 21 years old ____he first helped to set up the company in 1976．He was a billionaire by the time he was 31 years old．_______, there are still some other people who have made lots_______ money at even younger ages．Other young people who have struck it rich include Jackie Coogan and Shirley Temple．_______ of these child actors made over a million dollars _______ （act） in movies before they were 14．But ______ youngest billionaire is Albert von Thurn und Taxis of Germany, who, in 2001, inherited （继承） a billion dollars when he turned 18!