How to say in Czech: Where do they know you from?

English
Where do know from?
Czech
Odkud tě znají?
Where are you going?
Where do I buy a ticket?
Where are they from?
Where did they learn Arabic?
Where do they live?
Where do they work?
They do not know you.
They don’t know what you mean by that.
They know what you did last year.
They know what you did yesterday.

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