How to say in Czech: What are you talking about?

English
What are you talking about?
Czech
O čem to mluvíš?
Are you talking to me?
Who are we talking to?
She doesn’t want to talk about it.
Can I talk to you for a minute?
Look at me when I talk to you!
Could I talk to you alone?
You are young.
You didn’t write that.
What are you writing about?
What are you thinking about?

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