plan to do sth/doing sth

plan to do sth/doing sth
1、live 与live in的区别?是the place they live in 还是the place they live?
2、two thirds 请详述分数的表示方法.
3、learn in/over the radio?
4、what's the best/which is the best 好像都行,请简述此种句型中what与which的区别
5、get/win the price 两词区别
6、the whole class nothing简析句子
7、may be的否定形式?may not be or not may be