not born yesterday
可不傻
A:Who broke the glass, Peter?
A:彼得,谁把杯子打破了?
B:The cat.
B:是猫。
A:I was not born yesterday. It must be either you or Adam.
A:你骗不了我,不是你就是亚当。
B:It's me, mum. I'm sorry.
B:是我,妈妈,对不起。