问题补充:
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
答案:
A. all of what
B. all of which
C. all of them
(答案→)D. all of whom
解析:考查定语从句。句义:那些孩子们,所有人都玩了一整天,都累了。本题先行词是人(the children),且前面有介词,所以选择whom