Question

The children, _____ had played the whole day long, were worn out.

A．all of what	B．all of them
C．all of whom	D．all of which

Answer 1

C

试题分析：考查非限制性定语从句，句意：那些玩了一整天的孩子们，都已经累坏了。首先先行词是the children是指人的，排除AB，them不能引导从句，这里是不定代词all+介词+whom引导定语从句，选C。