Exercise 2: Choose the word whose underlined part is pronounced differently from that of the others 21. A. away B. bird C. common D. weather 22. A. heard B. breathe C. hurt D. earth 23. A. birth B. answer C. exercise D. colour 24. A. unique B. usual C. surfing D. human 25. A. of B. leaf C. life D. knife 26. A. cough B. thought C. enough C. laugh 27. A. charity B. hi-tech C. headache D. chemical 28. A. graffiti B. garden C. general D. google 29. A. calorie B. carve C. collage D. centre 30. A. certain B. compare C. encourage D. community

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