"who was it" in Chinese (Simplified)

是谁？

Definition

在你想知道是谁做了某事或者在场，但你不知道是谁时问的问题。

多用于口语中，常常在听到或看到什么但没认出人时说。语气可以表示好奇、惊讶或怀疑。类似表达有：“是谁做的？”、“那是谁？”。

Who was it at the door just now?

刚才在门口的**是谁**？

Someone called, but who was it?

有人打电话了，但**是谁**？

I heard a noise. Who was it?

我听到一声响。**是谁**？

If you know who was it, just tell me.

如果你知道**是谁**，就直接告诉我。

They left a note, but I have no idea who was it.

他们留了张纸条，但我完全不知道**是谁**。

You sounded surprised. Who was it that showed up?

你听起来很惊讶。到底**是谁**来了？