Who/Whom
Whom (The principle demanded to know him)
After sensing a problem with the senior class, the principal demanded to know (who, whom) the class leaders had contacted to conduct the petition drive.
Whom (Mom invited him)
(Who, Whom) did Mom invite to Marcela's birthday party?
Who (He invited Richard)
(Who, Whom) invited Richard to be the representative for the entire class?
Whom (The commander wanted to know him)
Although the admiral wanted the commander to resign, the commander still wanted to know (who, whom) he had offended.
Whom (The Vikings drafted him)
Brian O'Neill is the running back (who, whom) the Minnesota Vikings drafted in the second round.
Who (She will create)
Susan is the chef (who, whom) will create an exquisite menu for our ten-year reunion.
Who (He had ordered)
When the chef arrived at the restaurant, she asked (who, whom) had ordered only thirty pounds of chicken for the month of August.
He/She
Who
Him/Her
Whom
Who (He removed the milk bottle)
William, (who, whom) removed the milk bottle from the refrigerator?
Who (She attended high school graduation)
(Who, Whom) attended the high school graduation ceremony with Rhonda?