It is a strange phenomenon that some young people today think it is their parents’responsibility to earn money and to spend it.
A. them
B. they
C. their
D. theirs
网友回答
A. them
B. they
C. their
(答案→)D. theirs
解析：考查物主代词。句意“有一个奇怪的现象是，一些年轻人认为他们的父母有义务赚钱，而他们负责花钱。”这里的theirs是名词性物主代词，指代their responsibility。故选D。