— Let's go and have a good drink tonight.
— Have you got first prize in the competition?
A：What for?
B：Thanks a lot.
C：Yes, I'd like to.
D：Why not?
工商业者的子弟可以参加科举考试，允许做官，最早是从（ ） 开始的。
实现民族团结和国家统一的文化基础是（ ）
