How to say in Czech: They know what they did last year.

English
know what did last year.
Czech
Oni vědí, co dělali minulý rok.
What did they do last year?
What happened last year?
It happened last year.
When was the last time they saw each other?
He knows what they did yesterday.
Get off at the last stop.
I want to apologize for my behaviour last night.
This is the last stop.
I don’t know what they mean by that.
They don’t know what to do anymore.

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