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