This novel is set in the modern city San Francisco so once it will be very popular.A. p

问题补充：

This novel is set in the modern city, San Francisco, so once, it will be very popular.

A. publishes

B. having published

C. publishing

D. published

答案：

A. publishes

B. having published

C. publishing

(答案→)D. published

解析：过去分词作状语，publish的逻辑主语是the novel，两者是逻辑上的动宾关系。