кӣ

Ин хабарро аз кӣ шунидӣ?
Who did you hear this news from?
Шумо киро бештар эҳтиром мекунед?
Who do you respect more?

Bonus:
In the second sentence кӣ is the object, so takes the object marker ро. The letter ӣ is changed to и because ӣ can’t occur in the middle of a word.

ҳар кӣ: all who, whoever