"Kdo je to?"

[Phong.]

Why is 'who is this?' wrong?

[Leo_Alshafei]

I think it should be right. Just report it as a problem.

[DarrylMose]

On mine, the instructions say "Type what you hear," not translate.

[IanFry]

I see "Who is that" is counted as correct, but how is the difference made with "to" being "it" or "that"? Is it just context? I've seen "Kdo to je?" - does that stress the "to" more to mean "that"?