I’m so excited.
我兴奋的要命。
I just won a lottery.
You are kidding.
I bought a lottery ticket.
我买了张彩票。
You are kidding.
=You are joking.
You are kidding me. You must be kidding.
Are you kidding me? Are you joking?
I’m so excited.
I’m so excited I’ve got good grade in English.
