How to say in Czech: Who is working on it?

English
Who is working on it?
Czech
Kdo na tom pracuje?
He is not working on it.
He is working on it.
Is he working on it?
What is he working on?
Who is looking for work?
Who has the tickets?
We never work on Sunday.
Does it work?
It doesn’t work.
It will work.

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