With a per capita income of about 30000 dollars, ______ is the r

With a per capita income of about 30000 dollars, ______ is the richest country in the western hemisphere.
A、the United States
B、the European Union
C、Japan
D、Canada
【正确答案】：D
【题目解析】：With a per capita income of about 30000 dollars, the United States is the richest country in the western hemisphere.参见教材P21。