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