Choose any of the words specified in the bracket
1) Everyone asked Joan and (he, him, himself) to speak at the convention.
2) The teacher about (who, whom) you were asking is not here.
3) I couldn't tell whether it was George or (he, him) at the door.
4) There is very little feeling between Mary and (I, me).
Always pick the verb first, and then try to find the subject. Once you do that, see if the pronoun required is subjective vs objective