【题目】Newly released data point to an increase in technology use among children some worry is changing the very nature of childhood.
A. why B. which
C. who D. where
在线课程【答案】B
【解析】B考查定语从句关系词。句意：最新公布的数据显示，儿童使用技术有所增加，一些人担心这将改变儿童的天性。Which引导定语从句指代an increase in technology use，在从句中作主语，some worry是插入语，故选B。