Question

【题目】The boy ____ lost his backpack has to borrow books from his teachers.
A.whose
B.who
C.whom
D.which

Answer 1

【答案】B
【解析】句意为：丢失书包的男孩不得不向他的老师借书。根据语境可知，这是一个定语从句。从句的引导词由先行词决定。whose：先行词指物主，作定语；who：先行词指人，作主语；whom：先行词指人，作宾语；which：先行词指事物。根据语境可知，这里先行词指人，作主语，故应选B。