Answer:
2. Fairfield Porter showed a lack of artistic talents compared to his siblings.
3. C
4. After a final count, it was determined that Dennis won the contest.
5. C
6. After applicants failed the entrance exam for five consecutive years, school officials think it's time to make a change.
7. A recent study found that senior surgeons use intuition significantly more often than do most residents or mid-level doctors.
8. C
Step-by-step explanation:
ACTIVE voice: (subject , verb , object)
e.g He received a letter.
PASSIVE voice: (object , verb , subject)
e.g A letter was received by him.