The fact that many college graduates get lower pay than some workers has a heated discussion.
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
(答案→)D. set off
解析：短语辨析. A.出发;开始 B.开始做…… C.建立；开业 D.出发；动身；引起。句意：许多大学毕业生获得薪水比一些人工还要低的事实引起了一阵热烈的讨论。故选D。