61. who, what　

who 指姓名或关系；
what 指职业或地位，例：What is your dad? He is a teacher.

62. what, which　

what 的选择基础是无限制的；
which 在一定范围内进行选择，例：Which do you prefer, bananas or apples?

63. other, another　

other 后接名词复数，例：other students
another 后接名词单数，例：another student

64. not a little, not a bit　

not a little 非常；
not a bit 一点也不，例：I'm not a bit tired. 我一点儿也不累。

65. many, much, a lot of　

many 和可数名词连用，例：I haven't many books.
much 和不可数名词连用；
a lot of 可数，不可数均可，但不用于否定句。