The person who knocks at door can't be my elder sister, she has gone to Beijing.
This girl is probably your younger sister, she is very alike when wearing and following you.
I firmly believe, she can not do such a bad thing.
There may be a wallet on the ground, it is too dark, I can not see clearly.
The one knocking at the door must not be my elder sister, because she has gone to Beijing.
The girl maybe is your younger sister, because she looks like you.
I believe that she never do something bad like this.
There may be a wallet on the ground,but I couldn't see it clearly because of darkness.
1.The person knocking at the door can't be my sister. She has gone to Beijing.
2.This girl must be your sister.She looks like you very much.
3.I believe that she wouldn't do such a terrible thing.
4.There may be a wallet on the ground. It is so dark that I could not see clearly.