Based on the given pronunciations, I will analyze and choose the word with the underlined part (or a part that is supposed to be different) pronounced differently from the rest for each question.
1. A. commerce: ˈkɑmərs
B. collect: kəˈlɛkt
C. proceed: pərˈsid
D. correct: kərˈɛkt
The underlined parts of the words A, B, and D all contain the sounds /ɛ/ or /ɛkt/, but in the word C (proceed), it is /sid/. The answer is C. proceed.
2. A. stops: stɑps
B. flights: flaɪts
C. likes: laɪks
D. arrives: əraɪvz
The underlined parts of the words B, C, and D all contain the sound /aɪ/, but in the word A (stops), it is /ɑ/. The answer is A. stops.
3. A. finished: ˈfɪnɪʃt
B. developed: dɪˈvɛləpt
C. defeated: dɪˈfitɪd
D. looked: lʊkt
The underlined parts of the words A, B, and C all have the stress (trọng âm) on the second syllable, but in the word D (looked), it has only one syllable, so the stress is not comparable. However, looking closer at the actual sound in the underlined part, we can see that the word D (looked) has the sound /ʊkt/, while the word A (finished) has /ɪʃt/. The answer is D. looked.
4. A. hesitate: ˈhɛzəteɪt
B. reserve: rɪˈzərv
C. physics: ˈfɪzɪks
D. basic: ˈbeɪsɪk
The underlined parts of the words A, B, and C all have the stress (trọng âm) on the first or second syllable, and /ɛ/, /ɪ/, /ɪ/ are all short sounds. However, in the word D (basic), it has a long /ɪ/ sound but more importantly, /eɪ/. However, we can also see that the word D (basic) starts with the sound /beɪ/, while the word A (hesitate) starts with /hɛ/, and /ɛ/ sounds different from /eɪ/. The answer is D. basic.
5. A. endangered: ɪnˈdeɪnʤərd
B. preserved: prɪˈzərvd
C. marked: mɑrkt
D. learned: ˈlərnɪd
The underlined parts of the words A and B all contain the sound /ɪ/, but in the word C (marked) and D (learned), the underlined parts are not comparable. However, the underlined parts of the words A and B all have the stress (trọng âm) on the second syllable, and the word C (marked) has a different underlined part sound /mɑrkt/. The answer is C. marked.
6. A. helps: hɛlps
B. laughs: læfs
C. likes: laɪks
D. arrives: əraɪvz
The underlined parts of the words C and D all contain the sound /aɪ/, but in the word A (helps) and B (laughs), the underlined parts are /ɛ/ and /æ/ respectively. The answer is B. laughs.
7. A. filled: fɪld
B. missed: mɪst
C. coughed: kɔft
D. watched: wɔʧt
The underlined parts of the words A and B all contain the sound /ɪ/, but in the words C (coughed) and D (watched), the underlined parts are not comparable, containing /ɔ/ and /ɔʧ/ respectively. The answer is A or B (depending on whether /ɪ/ is considered the underlined part) or C or D (depending on whether /ɔ/ or /ɔʧ/ is considered the underlined part).
8. A. biologist: baɪˈɑləʤɪst
B. gravity: ˈgrævɪti
C. variety: vərˈaɪəti
D. while: waɪl
The underlined parts of the words A, C, and D all contain the sound /aɪ/, but in the word B (gravity), it is /æ/. The answer is B. gravity.
9. A. peasant: ˈpɛzənt
B. decrease: ˈdikris
C. leaves: livz
D. measure: ˈmɛʒər
The underlined parts of the words A and D all contain the sound /ɛ/, but in the words B (decrease) and C (leaves), the underlined parts are not comparable, containing /i/ and /ivz/ respectively. The answer is B. decrease.
10. A. cheer: ʧɪr
B. cholesterol: kəˈlɛstərəl
C. check: ʧɛk
D. charming: ˈʧɑrmɪŋ
The underlined parts of the words A and C all contain the sound /ɪ/ and /ɛ/ respectively, but in the word B (cholesterol), it is /ɛ/. The answer is D (depending on whether /ɑ/ is considered the underlined part).