①坚持经济建设为中心
②着力保障改善民生,促进社会公平正义
③深化分配制度改革,不断增加居民收入
④健全社会主义法制,保障人民民主权利
A:①②③
B:①③④
C:①②④
D:②③④
划分发达国家和发展中国家的依据是( )
Luckily, some people managed to run out of the ____ (burn) building.
——I can hardly believe my eyes. Is that you, Lucy?——Yes. It has been almost 20 years______ we were together.