问题
选择题
The real-name policy for train tickets has been applied to all trains since January l, 2012 in China,________ will make it easy for people to get tickets.
A．which
B．when
C．what
D．Where
答案
答案：A
题目分析：考查定语从句。根据横线前的逗号可知，是非限制性定语从句，what不能引导定语从句，排除C；定语从句缺少主语，这里指代“火车票实名制”这件事，用which。故选A。