问题补充:
The boy is standing at the school gate is our monitor.
A. which
B. whose
C. who
D. when
答案:
A. which
B. whose
(答案→)C. who
D. when
解析:考察定语从句。本题定语从句的先行词是the boy,这是一个指人的名词,定语从句中缺少主语,故使用关系代词who指代先行词在句中作主语。AD的先行词不能是人,whose在句中不能做主语,只能做定语。句意:那个站在校门口的男孩是我们的班长。故C正确。