—Why was Mr. Liu thundering in the classroom yesterday?
— A student’s interrupting his speech the burst of his anger.
A. set up
B. set off
C. set about
D. set out
网友回答
A. set up
(答案→)B. set off
C. set about
D. set out
解析：考查set的词组辨析。Set up建立 set off 出发，引起，使爆炸 set about 开始着手干某事 set out 开始，出发 句意为---为什么刘老师昨天在教室里大发雷霆？---一个学生妨碍了他的讲话引发了他脾气的爆发。