The fact that many college graduates get lower salary than some workers has an online debate.
A. set out
B. set about
C. set up
D. set off
网友回答
A. set out
B. set about
C. set up
D. set off
解析：短语辨析。Ａ出发；Ｂ出发，开始；Ｃ建立；Ｄ引起，使发生，引爆；结合句意可知Ｄ正确。句意：很多大学生的工资比工人低引起了网上的讨论。