"Ano, zabil jsem je těmato rukama."

Translation: Yes, I killed them with these hands.

[Milan_Fornusek]

"těmato" sounds like "těmáto".

[VladaFu]

Unfortunately it is true. I will disable the listening exercise but it will continue to sound like that.

[Zdenek007]

Why not "I have killed"?

[fehrerdef]

should be possible

[Andalemanito]

why is 'with these arms' marked as wrong?

[folshost]

While technically I suppose you could kill someone with just your arms I think the more common thing would be to do so with your hands.