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1. The answer is A. The pronunciation of the underlined part 'u' of "reduce" is /ʊ/ (or /u/), while the pronunciation of the underlined part of the other three words is /i/. The IPA notations show this: reduce: rɪˈdus (different u pronunciation), release: riˈlis, forest: ˈfɔrɪst, process: ˈprɔsɛs 2. The answer is B. The underlined part of "rubbish" has a 'u' pronounced /ʊ/ (or /u/), while the underlined part of the other three words has a different vowel pronunciation. In IPA notation: cutting: ˈkətɪŋ, rubbish: ˈrəbɪʃ, harmful: ˈhɑrmfəl, substance: ˈsəbstəns (the three words other than "rubbish" have a schwa sound) 3. The answer is D. The underlined part of "pick" has a short 'i' pronounced /ɪ/, while the underlined part of the other three words has a different vowel pronunciation. In IPA notation: risk: rɪsk (has a different vowel sound /ɪ/), wild: waɪld (diphthong sound), habitat: hæbɪtæt, pick: pɪk (short 'i') 4. The answer is C. The underlined part of "bill" has a short 'i' pronounced /ɪ/, while the underlined part of the other three words has a different vowel pronunciation. In IPA notation: minority: məˈnɔrəti, miss: mɪs, bill: bɪl, convenience: kənˈvinjəns 5. The answer is C. The underlined part of "large" has a different vowel pronunciation compared to the other three words, which all end in a schwa sound (/ə/) or an unstressed 'e'. In IPA notation: disaster: dɪˈzæstər, market: ˈmɑrkɪt, large: lɑrʤ, range: reɪnʤ 6. The answer is C. The underlined part of "neighbour" has a diphthong 'ei' pronounced /eɪ/, while the underlined part of the other three words has a different vowel pronunciation. In IPA notation: loud: laʊd, neighbour: ˈneɪbər, outdoors: ˈaʊtˈdɔrz, discount: ˈdɪskaʊnt 7. The answer is D. The underlined part of "closed" has a diphthong 'o' pronounced /oʊ/, while the underlined part of the other three words has a different vowel pronunciation. In IPA notation: decided: dɪˈsaɪdɪd, gained: geɪnd, prepared: priˈpɛrd, closed: kloʊzd 8. The answer is D. The underlined part of "arrived" has a different vowel pronunciation compared to the other three words. In IPA notation: laughed: læft, enjoyed: ɛnˈʤɔɪd, changed: ʧeɪnʤd, arrived: əraɪvd (schwa sound in "arrived" but different vowel sounds in the other three) 9. The answer is B. The underlined part of "honor" has a different vowel pronunciation compared to the other three words. In IPA notation: host: hoʊst, honor: ˈɑnər, hockey: ˈhɑki, horror: ˈhɔrər 10. The answer is C. The underlined part of "length" has a different vowel pronunciation compared to the other three words. In IPA notation: athlete: ˈæθlit, author: ˈɔθər, length: lɛŋθ, southern: ˈsəðərn