There are five factories in this region, _______over 100 workers

There are five factories in this region, _______over 100 workers.
A、with each have
B、each having
C、each has
D、with each has over
【正确答案】：B
【题目解析】：首先可以使用排除法，with后面动词要用ing形式，所以排除A、D项；句子后半部分是独立主格结构，each是逻辑主语，独立主格结构表主动时，要用ing形式，故选B。