In 2008，______ was the first African American to be elected president of the United States.
A、Bill Clinton
B、Ronald Reagan
C、Benjamin Franklin
D、Barack Obama
【正确答案】：D
【题目解析】：In 2008，Barack Obama was the first African American to be elected president of the United States.参加教材P189。
掌握“Racial and Ethnic Groups(USA)”知识点。
