Choose the word whose main stressed syllable is placed differently from that of the other in each group.
1. A. competitive B. proactive C. selective D. interactive
2. A. identity B. positive C. primitive D. telephone
3. A. curiosity B. nationality C. community D. university
4. A. priority B. repetitive C. electrical D. energetic
5. A. simplicity B. quality C. equality D. activity
6. A. cigarette B. referee C. newspaper D. engineer
7. A. educate B. valuable C. interesting D. committee
8. A. appear B. wonder C. happen D. study
9. A. beauty B. advice C. postcard D. picture
10. A. equipment B. assistant C. experiment D. sociable
11. A. beautiful B. factory C. animal D. pollution
12. A. atmosphere B. poisonous C. polluted D. telephone
13. A. pedestrian B. institute C. document D. energy
14. A. celebrate B. symbolise C. festival D. guarantee
15. A. tropical B. equipment C. available D. extensive
11. A. picnic B. fishing C. arrive D. move
12. A. tommorrow B. badminton C. aerobic D. usually
13. A. frequently B. gymnastic C. adjective D. difference
14. A. activity B. destination C. independent D. intersection
15. A. recycle B. potato C. collectionD. dangerous
11c
12a
13d
14a
15d