Why not "I have killed"?
should be possible
This sentence is disturbing!
Have you never killed a fly or a spider? Most people have.
But!!! not with my hands, hahaha :-D
why is 'with these arms' marked as wrong?
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.
"těmato" sounds like "těmáto".
Unfortunately it is true. I will disable the listening exercise but it will continue to sound like that.