１、---Is that the small town you often refer to?
---Right, just the one _____you know I used to work for years.
A.that B.which C.where D.what
答案选C，为什么要选C ？那A或B为什么不能选？
2、I don't like the way _____you speak to your mother.
A.on which B. which C. in that D./
答案选D，为什么？其它选项为什么不能选?请分别解释一下。谢谢了！！！