Students should everything important that their teachers give in class.
A. set up
B. set down
C. set aside
D. set out
网友回答
A. set up
(答案→)B. set down
C. set aside
D. set out
解析：句意：学生应该记下老师在课堂上所讲的一切。set up 设立； set down记下； set aside留出； set out出发。根据句意故选B。