The two cities referred _ London and Paris.A.to is B.to are C.to be D.areThe two cities referred _ London and Paris.A.to is B.to are C.to be D.areWhy

问题描述:

The two cities referred _ London and Paris.A.to is B.to are C.to be D.are
The two cities referred _ London and Paris.
A.to is B.to are C.to be D.are
Why

referred to 修饰The two cities