Ккаждому предложению задать общий,подлежащий и специальный вопрос 1)greta mist a letter at 5 o'clok2)doors mist go school in the morning3)make must have dinner at 12 o'clok

Must Greta write a letter at 5 o'clock?
Who must write a letter at 5 o'clock?
when must Greta write a letter
must Doors go to school in the morning?
who must go to school in the morning?
where must Doors go in the morning?
must Mike have dinner at 12 o'clock?
Who must have dinner at 12 o'clock?
what must Mike have at 12 o'clock?