2.
Speaking:

1.You are looking for two seats to set down, but there was no one.
none为代词，意为“没有人，没有任何东西”，既可指可数名词，也可指不可数名词。做主语时，谓语动词既可用单数，也可用复数。
None of that money on that table is mine.
None of us is/are afraid of difficulties.
辨析none, no one, neither, nothing
neither意为“两者都不”用于两个人或事物，只能与单数名词或代词连用，后可直接加名词，也可加of短语。
none用来指三者或三者以上的人或事，常与of短语连用，在简略答语中用来回答how many/how much引起的问句。
no one只能指人，不能指物，不能与of短语连用，用作单数，在简略答语中用来回答who引导的问句。
Nothing用于指物，不与of短语连用，只泛指“没什么事情或东西”，用作单数，在简略答语中用来回答what引起的问句。
Neither story is true.
---How many elephant do you see there?
---None.
---Who is in the room now?
---No one.
---What have you bought?
---Nothing.
2.You take the wrong one.
one, that, it
one表示泛指，替代前面提到过的同类人或物，但不是同一个，它只能替代可数名词，复数形式ones.
that表示特指，既可替代可数名词(复数形式those)，也可以替代不可数名词。不可替代表示人的名词。
it表示特指，指代前面提到过的那个事物（是同一个），用于指可数名词单数或不可数名词。
I lost my cell phone, I can’t find it, so I bought a new one.
---Do you have a camera?
---No, but my father has one. He bought it a week ago.
The weather in Qingdao is better than that in Wuhan.
生词表: