The old man leads ______happy life now, but he will never forget ______hard time when he was poor.

A．the, a

B．/; the

C．the; /

D．a, the

花石楼是一部青岛近代建筑折衷主义的代表作，是一个欧洲多元建筑文化融合的综合体，也是中国建筑师习作欧风别墅的成功作品。