Nowadays almost everyone prefers to use a smart mobile phone functions are more practical.
A. which
B. where
C. what
D. whose
网友回答
A. which
B. where
C. what
(答案→)D. whose
解析：考查定语从句：句意：现在几乎每个人都更喜欢使用只能手机它的功能更加实用。先行词是a smart mobile phone，定语从句中缺少定语，用whose引导定语从句，选D。