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
