Declension of who and what (koga, čemu)

QuestionAnswer
whom (genitive / accusative)
koga
reception
domjenak
Whom are you waiting for at the reception?
Koga čekaš na domjenku?
I do not know whom they invited.
Ne znam koga su pozvali.
to whom
kome
To whom did you give the gift?
Kome si dao poklon?
I do not know whom you are talking about because it is very noisy here.
Ne znam o kome pričate jer je ovdje jako bučno.
whom (instrumental)
kim
With whom will you go to the reception?
S kim ćeš ići na domjenak?
With whom do you work on the new project?
S kim radiš na novom projektu?
of what
čega
What is she afraid of?
Čega se ona boji?
delighted
oduševljen
What is he so delighted about?
Zbog čega je tako oduševljen?
to what
čemu
participant
sudionik
What are the participants discussing?
O čemu sudionici raspravljaju?
talkative
pričljiv
What is this talkative man laughing at?
Čemu se smije ovaj pričljivi čovjek?
with what
čime
What are you delighted with?
Čime si oduševljen?
What does your friend do for a living?
Čime se bavi tvoj prijatelj?
Who is the talkative participant talking with?
S kim razgovara pričljivi sudionik?