"Vidíš toho osla?"

Translation: Do you see that donkey?

[AquaRoseDr]

What's up with toho?

[VladaFu]

accusative case

[Sa-Matra]

Why "See that donkey?" is not correct answer here?

[BoneheadBass]

It would definitely be used, at least in the US. But it's a pretty informal construction, so I'm not sure it should be accepted.

----- EDIT -----
This informal variant likely started out as the standard "Do/Can you see that donkey?" then was shortened to "You see that donkey?" then shortened even further to "See that donkey?" It's just one example of the "evolution" (some might say "ruination") of English.