问题
选择题
Nowadays people are more concerned about the environment ________ they live.
A．what
B．which
C．when
D．where
答案
答案：D
D 考查定语从句。句意：现在人们更加关心他们居住的环境。先行词是environment，将先行词代入定语从句后为：They live in the environment.由此可见关系词在定语从句中作地点状语，故用where引导定语从句。