根据下列短文内容，在短文后的空格处填上一个恰当的词，使短文完整、通顺。
Ten-year-old Barack Obama was one of only three black 1 at his school in Hawaii, USA. He felt
very 2 from most other students. White girls wanted to touch his hair. A white boy 3
him if his father ate people."I lied to them that my father was a Kenyan (肯尼亚) prince (王子).
But I kept asking 4 who I am," said Obama. However, 37 years later, the boy made history.
Obama became the 5 black president (总统) in US history. Obama was 6 in 1961,
to an African father and a white American woman a small town in the USA. He grew 7 in
Indonesia and Hawaii. This unusual background made him wonder who he was. He once turned to
alcohol (酒精) to help forget this question. 8 the help of his friends, Obama finally turned his
life around at college. His hard work made him STAR Harvard (哈佛大学). Later, he became only the
third black senator (参议院) in US history. During his race to the highest post in the US, Obama talked
about this background. He called for a Untied States of America, rather than a white America or a
black America. Obama's success has made Martin Luther King's dream come 9 . That is:
A man should not be judged (判断) by the color of his skin, 10 by the content of his
character (性格).
—From BBC news.
