替换词one, ones, that, those, it,
this, that

1)one, ones, that, those
That替换单数可数名词或不可数名词；one只替换单数可数名词。
Eg: The vase on the left is more beautiful than __________ on the right.
The coffee produced in Brazil is more famous than __________in Mexico.

the one
that
That只用于替换表示事物名词， 而one/ones替换表示人和表示事物名词皆可。
Eg: His younger sister is taller than the elder ___.
I need the plastic bags, not the paper______ .
one
ones
That/ those普通不带前置定语，但必须有后置定语。One/ones都可。当替换词后置定语用全部格of短语或当替换词被全部格修饰时，不用one/ones而用that ...