"How can we respond to Привіт! /prɪˈvit/ without repeating the same words?"
Здоров!/zdoˈrɔv/ or Вітаю!-/viˈtɑ.ju/
when do we say "Добрий ранок!"-/ˈdɔ.brɪj ˈrɑ.nɔk/ ?
from 5:00 a.m. to 12:00 p.m.
when do we say "Добрий день! /0"ˈdɔ.brɪj dɛɲ/?
from 12:00 p.m. to 6:00 p.m.