Here are the answers for each question in the two categories:
1. A. division B. insurance C. shake D. show
The underlined part in A. division is pronounced /ɪ/ (short vowel), while the others use a different vowel sound.
2. A. peaceful B. social C. special D. ancient
The underlined part in D. ancient is pronounced /eɪ/ (diphthong), while the others use different vowel sounds.
3. A. she B. television C. decision D. efficient
The underlined part in A. she is pronounced /iː/, while the others are pronounced differently.
4. A. delicious B. action C. ship D. share
The underlined part in A. delicious is pronounced /ɪ/, while the others have different vowel sounds.
5. A. shop B. mansion C. nation D. visual
The underlined part in D. visual is pronounced /ɪ/, while the others use different vowel sounds.
6. A. leisure B. ocean C. fishing D. pleasure
The underlined part in B. ocean is pronounced /əʊ/, while the others use different vowel sounds.
7. A. intention B. ensure C. council D. usual
The underlined part in C. council is pronounced /aʊ/, while the others are pronounced differently.
8. A. brush B. push C. measure D. refuse
The underlined part in C. measure is pronounced /ʒ/, while the others use different sounds.
9. A. proposal B. mouse C. tension D. sense
The underlined part in B. mouse is pronounced /aʊ/, while the others use different vowel sounds.
10. A. division B. character C. chaos D. conclusion
The underlined part in C. chaos is pronounced /eɪ/, while the others use different vowel sounds.
11. A. chemical B. machine C. equation D. ambitious
The underlined part in C. equation is pronounced /eɪ/, while the others are pronounced differently.
12. A. shear B. wish C. nation D. music
The underlined part in B. wish is pronounced /ɪ/, while the others use different vowel sounds.
13. A. sugar B. business C. sister D. musician
The underlined part in B. business is pronounced /ɪ/, while the others use different vowel sounds.
14. A. insure B. artificial C. close D. cession
The underlined part in C. close is pronounced /oʊ/, while the others are pronounced differently.
15. A. niece B. cession C. vision D. measure
The underlined part in B. cession is pronounced /ɛ/, while the others are pronounced differently.
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For the second part (Choose the word which has a different stress pattern):
16.
1. A. refuse (noun: refuse, verb: refuse)
2. B. record (noun: record, verb: record)
3. C. address (noun: address, verb: address)
4. D. permit (noun: permit, verb: permit)
Answer: D. permit has a different stress pattern (verb: stress on the second syllable, noun: stress on the first syllable).