Question

—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; /

Answer 1

B

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。