Who/Whom

1. (Who/Whom) did you go to the game with? Whom

2. She’s the student (who/whom) writes the best articles. Who

3. (Who/Whom) did you vote for? Whom

4. (Who/Whom) failed the quiz? Who

5. We know (who/whom) pulled that prank. Who

6. We want to know on (who/whom) the prank was pulled. Whom