问题
选择题
The book represents a wonderful love story, so once______, it will be popular with young people.
A．publishes
B．publishing
C．published
D．having published
答案
答案：C
once作为连接词引导条件状语从句, 后面可以接现在分词或过去分词,由于it与publish为被动关系, 所以用过去分词published作状语。