There is a factory which we visited.= There is a factory.We visited the factory.

问题描述:

There is a factory which we visited.= There is a factory.We visited the factory.
This is the factory which we visited.=This is a factory.We visited the factory.The person to whom you just talked is my father.=The person is my father.You talked to the person.这些定语从句改为简单句都对吗?

对的,你改得全对.

You talked to the person少了一个单词just.

You justtalked to the person.