A: Who broke the glass, Peter?
B: That cat.
A: I was not born yesterday. It must be either you or Adam.
B: It’s me, mun, I am sorry.
not born yesterday
However young she is, she wans’t born yesterday.
He wanted to show his associates that he was not born yesterday.
He knows how to solve such a problem. He was not born yesterday.
I would like to mind you I was not born yesterday.
either ... or... ：不是......就是......，或者......或者......
Eg. When the girl is happy, she either sings or dances.
Eg. Either you or I am going there tomorrow.
Eg. You must either go at once or wait till tomorrow.
Eg. We can finish the work either this week or next week.