How to say in Czech: Do you know this boy?

English
Do know this
Czech
Znáš tohohle kluka?
Does anybody know this boy?
What is this boy doing here?
Who is this boy?
Why is this boy here?
You are such a boring boy!
You are such a brave boy!
You are young.
You didn’t write that.
Do you know Miss Nováková?
Do you know my address?

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