I. Choose the words whose underlined part is pronounced differently from that of the others in each group

 20. A. saved B. polluted C. enjoyed D. reused

21. A. arrived B. helped C. returned D. remembered

22. A. serious B. symptom C. sure D. sauce

23. A. lake B. cabbage C. population D. space

24. A. hungry B. range C. orange D. change

25. A. shoulder B. mountain C. housework D. round

26. A. prefer B. better C. teacher D. worker

27. A. bear B. hear C. dear D. near

28. A. collect B. concern C. concert D. combine

29. A. stopped B. laughed C. walked D. stayed

30 A. them B. theory C. through D. thistle

31. A. hire B. hope C. honour D. health

32. A. chemistry B. study C. primary D. apply

33. A. sky B. deny C. differently D. cry

34. A. city B. special C. bicycle D. center

35. A. tables B. noses C. boxes D. changes

36. A. son B. sugar C. soup D. sing

37. A. would B. where C. well D. who

38. A. stopped B. washed C. studied D. looked

39. A. machine B. armchair C. children D. watch

40. A. classes B. lakes C. cages D. houses

41. A. few B. new C. sew D. nephew

42. A. closed B. practiced C. asked D. stopped

43. A. gift B. mine C. arrive D. tired

44. A. family B. mechanic C. animal D. machine

45. A. about B. south C. count D. young

46. A. look B. school C. loose D. food

47. A. nice B. bicycle C. rides D. live

48. A. mine B. history C. exercise D. library

49. A. image B. travel C. relax D. match

50. A. clown B. down C. own D. town

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