61. who, what
who指姓名或关系，what指职业或地位 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 Which do you prefer, bananas or apples?
63. other, another
other后接名词复数，another后接名词单数 other students, another student
64. not a little, not a bit
not a little非常，not a bit一点也不 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，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 I haven't many books.
66. much more…than, many more…than
much more…than后接形容词或不可数名词，many more…than后接可数名词 many more people, much more water, much more beautiful