第二节：语法填空: 根据短文内容，在空格中填上合适的单词。（共15分，每空1.5分）

In the United States, there were 222 people   81        (report) to be billionaires in 2003. The  82      of these is Bill Gates, worth at least $41 billion, who made his money 83  starting the company Microsoft. Mr Gates was only 21 years old   84     he first helped to set up the company in 1976. He was a billionaire  85     the time he was 31.

86     , there are still some other people who have made lots of money at even 87   (young) ages. Other young people who have struck it rich include Jackie Coogan and Shirley Temple.    88      of these child actors made over a million dollars    89     (act) in movies before they were 14. But    90    youngest billionaire is Albert von Thurn and Taxis of Germany, who, in 2001, inherited a billion dollars when he turned 18.

全口义齿修复的受限因素不包括（）

A.年龄

B.面容

C.味觉、品尝能力

D.咀嚼、吞咽和语言功能

E.社交和心理因素