The real-name policy for train tickets has been applied to all trains since January 1,2012 in China, I think will make it easy for people to get tickets.
A. which
B. when
C. what
D. where
网友回答
(答案→)A. which
B. when
C. what
D. where
解析：句意：自从2012年1月1日起，国家实行了实名买火车票，我认为这将让人们买票更放便些。这是定语从句，从句中缺少主语，what不能引导定语从句，故选A。