What happened? 你怎么了？

Peter: Mom, my nose is bleeding.<br>Mom: What happened, peter? Did you have a fight?<br>Peter: No, mom. I didn’t.<br>Mom: Did somebody hit you? Or did you just fall?<br>Peter: Mom~ I was just picking my nose, and now it’s bleeding.<br><br>Bleed 流血<br>Happen 发生<br>Fight 打架<br>Hit 打，打击<br>Fall 落下，跌倒<br>Pick nose 挖鼻子