问题
选择题
.The Forbidden City is an area ＿＿ once only the emperor, his family and officials were allowed.
A．which
B．who
C．where
D．whose
答案
答案：C
考查定语从句。句中先行词为area，在从句中作地点状语，故用关系副词where。句意：紫禁城是一个只有皇帝、他的家人和官员被允许进入的地方。