He has written a book I have forgotten.
A. which name
Bwhich of name
C. whose name
D. the name of whose
网友回答
A. which name
B. which of name
(答案→)C. whose name
D. the name of whose
解析：考查定语从句。先行词是a book，根据句意可知，“我”忘记了书名，whose引导定语从句，在定语从句中作定语，whose name相当于the name of which。故选C。