I hate those don’t help others when they are in trouble.A. whoB. whichC. whatD. where

问题补充：

I hate those don’t help others when they are in trouble.

A. who

B. which

C. what

D. where

答案：

(答案→)A. who

B. which

C. what

D. where

解析：考查定语从句。先行词those“那些人”，指人用who或whom引导定语从句。句意“我讨厌那些当别人有困难时，不去帮他们的人。”which指物，what不能用于定语从句，where指地点。故选A。