问题补充：
If you want to sell your product you must it.
A. advertise
B. advertise for
C. advertise on
D. advertise to
答案：
(答案→)A. advertise
B. advertise for
C. advertise on
D. advertise to
解析：advertise sth. 为……登广告，登广告宣传…… advertise for sth.(sb.)登广告征求或寻找某物或某人
比较：advertise jobs 登广告招人 advertise for jobs登广告求职
