During his race to the highest post in the US, Barack Obama called for ________ United States of America, rather than ________ white America or a black America．A.a;aB./;theC.the;aD.the;/
网友回答
A解析考查冠词的用法。第一空a United States of America意为“一个美利坚合众国”。第二空a white/black America意为“一个白人/黑人的美国”。