Question

someone is k no king at the door

——Oh,someone is koncking at the door.
___must be Amy.We will go to the club together.是填that 还是It为什么?并补充一下this ,that ,it ,one 的具体用法.跪谢.

Answer 1

答案：It
分析：It 不知道对方是谁,或只闻其声,不见其人时用；另外,代替前面提到的东西
that 代替不可数名词（如人口,天气等）
one 代替同类事物 .
this 给对方介绍朋友时用,一般不用来代替前面的东西.
如 Your skirt is beautiful .Where did you buy it I want to buy one.
加油!不明白再问!