—Do you know what EU stands for, Tommy?
—Sure．It stands for the European Union, European political and economic organization that encourages trade and friendship between countries that are members．
A. an; the
B. a; the
C. the; /
D. an; /
网友回答
A. an; the
(答案→)B. a; the
C. the; /
D. an; /
解析：考查冠词：句中a … organization一个……的组织；the countries that are members特指其成员国，故选B。