【题目】In view of rapidly aging population,the second-child policy at the start of 2016.
A. is adopted B. was adopted C. has been adopted D. was being adopted
在线课程【答案】B
【解析】考查时态和语态。policy与动词adopt（采纳，采用）是被动的关系，且at the start of 2016是明确的过去时间，应该用一般过去时的被动语态。句意：鉴于人口老龄化加速，两个孩子的计划生育政策在2016年初被采纳了。故选B。