为解决水资源短缺问题，海湾地区缺水国家纷纷建立了[ ]

A．海水淡化工厂

B．污水处理工厂

C．冰川运输工厂

D．跨流域调水工程

There is no doubt that holding such _____ National Day parade will significantly enhance _____ national

pride and self-confidence of Chinese People. [ ]

A. a; the

B. a; a

C. the; the

D. the; a