SAT语法题 为什么会选A it不是代词吗 前面没有所指 难道 it 指的是each 两个代词可以互相指代?
In neighborhoods throughout the United States,one can encounter hundreds of different rope-jumping games,（ each with its own rules）
A通上
B each having their own rules
C when they each have their own rules
D which has its own rules
E theu each have rules of their own