----Have you found the mobile phone you lost last week?
----No, but I’ve just bought a new one.
A. what
B. whose
C. whom
D. which
网友回答
A. what
B. whose
C. whom
(答案→)D. which
解析：考查定语从句。本定语从句的先行词是the mobile phone，which指代先行词在句中做lost的宾语。A项不是定语从句的关系词；C在句中做定语；whom的先行词是人。故D正确。