Choose the word whose main stressed syllable is placed differently from that of the others in each group.
6. A. popular B. population C. volleyball D. basketball
7. A. yoga B. music C. relax D. hobby
8. A. historical B. interest C. badminton D. favourite
9. A. sporty B. indoor C. outdoor D. compete
10. A. aerobics B. humorous C. practise D. separate
