How to say in Czech: What is he working on?

English
What is working on?
Czech
Na čem pracuje?
He is not working on it.
He is working on it.
Is he working on it?
He is young.
Who is working on it?
He lives there.
What kind of work do you want to do?
What is your address?
He is looking for work.
He is not looking for work.

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