请教英语问题~~~急 专业生动回答

请教英语问题~~~急 专业生动回答
定语从句
1.earth is a rocky ( ) where liquid water.答案是where,为啥不是which?
啥区别
2.It was in the factory（ ）my father worked that I worked now.括号里用where,知道原因,但为啥不能用 that 和 which
3
please pass me the book（whose） cover is yellow.括号里为啥不用 that which
4.Let‘s just read the little bit （ ）you have made a mistake.括号里为啥不用that,不是前面有little 修饰吗?答案用where