问题补充:
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
答案:
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。