Considering his health, I advise him to an hour or two each day to work out．
A. set about
B. set aside
C. set up
D. set off
网友回答
A. set about
(答案→)B. set aside
C. set up
D. set off
解析：这题考查词组辨析：set about开始，着手，set aside留出，set up 建立， set off出发，引起，句意是：考虑到他的健康，我建议他每天留出一两小时锻炼。选B。