How to say in Czech: Why are you telling us that?

English
Why are you telling that?
Czech
Proč nám to říkáš?
Why is the door closed?
They are telling the truth.
Excuse us.
You told us your address.
Who told us that?
Tell us your address.
Do you understand us?
Why are you asking?
Why are you hesitating?
Why were you late this morning?

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