Ⅰ. 用适当的关系代词、关系副词或介词+关系代词完成下列句子
1. I visited the farm where/on which a lot of cows were kept.
2. Is this the farm that/which you visited last year?
3. The time when we got together finally arrived.
4. You’d better change the way that/in which you educate your children.
