Pick out the word whose main stress is placed differently from the others.
1. A. ancient B. compose C. parade D. predict
2. A. lunar B. freedom C. humor D. describe
3. A. customer B. exclusive C. concentrate D. allergy
4. A. unfriendly B. persuasive C. commentary D. explosion
5. A. spectato r B. sterile C. relative D. horoscope