1、Who are you? 你是谁？你们是谁的意思，看见陌生人肯定要问一句。
2、All right, who are you and what are you doing in my office? 喂，你是谁，在我的办公室做什么？
3、或者客气些问，Can I help you? Who are you looking for? 我能帮你吗？你在找谁？
4、"Who are you, please?" I asked. I hadn't seen him before. 请问您是谁？我问，我以前没见过他，还可以看着镜子里的自己，自问自答，Who are you? 你是谁呢？
