Question

【题目】The children,____ had played the whole day long, were worn out.
A.all of what
B.all of which
C.all of them
D.all of whom

Answer 1

【答案】D
【解析】句意：孩子们都累坏了，他们都玩了一整天。这是一个非限制性定语从句句，关系代词指人且在介词之后，故用whom，选D。