These days it's hard to________the difference between the good guys and the bad guys.
A:say
B:make
C:tell
D:find
世界上钢铁产量最多的国家是____。
党的十八届五中全会提出,坚持计划生育基本国策,完善人口发展战略,全面实施一对夫妇可生育( )政策,积极开展应对人口老龄化行动。