—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; theB.a; theC.the; /D.an; /
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B解析这题考查冠词的用法：第一空填a，泛指一个欧洲政治经济组织，第二空填the，特指是：成员国。选B.