How to say in Czech: Do they know this child?

English
Do know this
Czech
Znají tohle dítě?
Does anybody know this child?
What is this child doing here?
They treat me like a child.
How many children do you have?
This is not my child.
Who is this child?
Whose child is this?
Why is this child here?
Are you an only child?
He is just a child.

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