I. Choose the words whose underlined part is pronounced differently from that of the others in each group. 1. A. doctor B. hospital C. pollution D. tomorrow 2. A. foot B. scooter C shoot D. food 3. A. champagne B. parachute C. cheer D. machine 4. A. traffic B. abundant C. band D. biogas 5. A. played B. decided C. listened D. enjoyed 6. A. dear B. heart C. hear D. fear 7. A. stupid B. studio C. study D. student 8. A. brother B. thick C. they D. that 9. A. cheer B. parachute C. champagne D. machine 10. A. doctor B. hospital C. pollution D. tomorrow 11. A. flood B. typhoon C. groom D. balloon 12. A. hobby B. hour C. humor D. hole 13. A. dynamite B. terrify C. deny D. symbol 14. A. thunder B. earthquake C. gather D. healthy 15. A dump B. nuclear C. bulb D. plumber 16. A. new B. sew C. few D. knew 17. A. noon B. tool C. blood D. spoon 18. A. plays B. looks C. wants D. helps 19. A. decided B. played C. listened D. enjoyed 20. A. feed B. heat C. meat D. pleasure 21. A. dear B. fear C. hear D. heart 22. A. stupid B. studio C. study D. student 23. A. brother B. thick C. they D. that 24. A machine B. parachute C. champagne D. cheer 25. A. doctor B. hospital C. pollution D. tomorrow 26. A. cough B. laugh C. enough D. high 27. A. collect B. clean C. city D. cracker 28. A. pottery B. melody C. modal D. profit 29. A. near B. clear C. dear D. learn 30. A. knocked B. needed C. founded D. wanted