I. Choose the words whose underlined part is pronounced differently from that of the others in each group.
1. A. airports B. suitcases C. things D. calculators
2. A. chemist B. chicken C. church D. changeable
3. A. university B. unique C. united D. undo
4. A. faithful B. fairy C. failure D. fainted
5. A. sun B. sure C. success D. sort
6. A. affect B. agency C. aquatic D. accommodation
7. A. measure B. illustrate C. source D. awesome
8. A. contaminate B. contaminant C. pollutant D. poison
9. A. shake B. scatter C. trap D. collapse
10. A. healthy B. thermal C. northern D. earth
11. A. interact B. landline C. chat D. verbal
12. A. weight B. height C. eight D. vein
13. A. accurate B. accept C. accident D. success
14. A. rubbish B. cultural C. thunder D. furious
15. A. diving B. discover C. discipline D. divide
16. A. cotton B. bottle C. cold D. common
17. A. shout B. sugar C. share D. surgery
18. A. valentine B. imagine C. discipline D. magazine
19. A. drummer B. future C. number D. umbrella
20. A. host B. cost C. post D. most
21. A. other B. leather C. wealthy D. brother
22. A. television B. elephant C. section D. Swedish
23. A. explain B. current C. desire D. electric
24. A. threaten B. thread C. seat D. bread
25. A. deaf B. leaf C. meat D. heat
26. A. allow B. follow C. yellow D. fellow
27. A. exhaust B. hour C. honest D. house
28. A. mood B. moon C. soon D. good
29. A. Dutch B. Russian C. just D. use
30. A. descent B. dissent C. discontent D. continent
1B 2A 3D 4B 5B 6B 7A 8A 9A 10C 11D 12D 13C 14D 15A 16B 17D 18A 19B 20B 21C 22D 23B 24C 25A 26A 27D 28D 29D 30D