—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; /

“闪闪的红星”歌曲中，有一段歌词是：“小小竹排江中游，巍巍青山两岸走”，其中“小小竹排江中游”是以______作参照物；“巍巍青山两岸走”是以______作参照物．