【题目】I lost a book________ I can't remember now.
A.whose title
B.its title
C.the title of it
D.the title of that

【答案】A
【解析】考查定语从句。句意：我丢了一本我不能想起名字的书。________ I can't remember now修饰先行词a book，先行词whose在从句中修饰 title作定语，也可以说the title of which。故选A。