In western culture,21 was the age________ young people traditionally received a

题型：不详难度：来源：

In western culture,21 was the age________ young people traditionally received a key to their parents’ door, as a symbol of entering adulthood.

A．in which

B．on which

C．at which

D．to which

答案

C

解析

本题考查定语从句。先行词age与介词at搭配。句意：在西方传统文化中，年轻人到了21岁便可获得进入父母房间的钥匙，象征着他们开始进入成人世界。