A: You look so happy, Xiaoming.
B: Yes, I'm so happy because I find my new bag.
A: Oh. That's good.
B: I was sad yesterday. I didn't find my new bag. My mum helped me. She saw it under my chair.
A: I was sad yesterday, too.
B: Why?
A: I lost my cap. And I can't find it. My mum is angry.
B: I'm sorry to hear that, Xiaogang.