I. Choose the word whose underlined part is pronounced differently. 1. A. this B. feather C. smooth D. south 2. A. leather B. that C. theatre D. then 3. A. nothing B. gather C. method D. death 4. A. something B. brother C. them D. weather 5. A. those B. there C. thank D. without 6. A. the B. south C. thick D. thing 7. A. healthy B. northern C. thirsty D. mouth 8. A. this B. these C. them D. earth 9. A. think B. month C. everything D. clothing 10. A. sixth B. another C. teeth D. author 11. A. tooth B. clothing C. bath D. both 12. A. gather B. monthly C. father D. brother 13. A. though B. thank C. through D. thin 14. A. earth B. thanks C. feather D. theater 15. A. the B. think C. with D. they 16. A. both B. theme C. thing D. than 17. A. three B. there C. tooth D. broth 18. A. mother B. feather C. birthday D. the 19. A. earth B. clothes C. smoothy D. worthy 20. A. bath B. thrilling C. southern D. thick