I'll analyze the pronunciation of each word and answer the questions.
1. The words "helped", "crashed", and "watched" all end with the "t" sound (as in "helped": hɛlpt, "crashed": kræʃt, and "watched": wɔʧt). On the other hand, "divided" ends with the "dɪd" sound (as in dɪˈvaɪdɪd). So, the underlined part of "divided" differs from the other three in pronunciation.
Answer: A. divided
2. The words "studied", "trained", and "lived" all end with the "d" sound (as in "studied": ˈstədid, "trained": treɪnd, and "lived": lɪvd). On the other hand, "cooked" ends with the "kt" sound (as in kʊkt). So, the underlined part of "cooked" differs from the other three in pronunciation.
Answer: B. cooked
3. The words "shared", "tided", and "developed" all have a different ending sound. "Shared" ends with the "rd" sound (as in ʃɛrd), while "tided" and "developed" end with the "d" sound (tided*) and (dɪˈvɛləpt), respectively, but "tided" is actually "tied". "Encouraged" ends with the "ʤd" sound (as in ɪnˈkərəʤd). But the one that stands out is "tided" or "shared", as in the original text the ipa for tided is not given so shared will be the answer
Answer: B. shared
4. The words "protected" and "planned" have a different ending sound. "Started", "protected", and "planted" end with the "d" sound (as in "started": ˈstɑrtɪd, "protected": prəˈtɛktɪd, and "planted": ˈplænɪd), while "planned" ends with the "nd" sound (as in plænd).
Answer: C. planned
5. The words "adopted" and "organised" have a different ending sound but they don't have the ending, "ed" sound as the rest. "Pleased", "organised", and "raised" have a different pronunciation but "adopted" is like the rest so "organised" is the answer, because it and "adopted" have a different vowel sound. No because for "adopted" it has the "ə" and for "organised" there is no ipa, hence "raised", "pleased", "adopted" end with the "zd", "zd", and "təd" sound respectively. "Organised" is the answer because "raised" "pleased" and "adopted" have the ending, "ed" sound.
Answer: C. organised
6. The words "materials", "items", and "benefits" all end with the "s" sound (as in məˈtɪriəlz, "items": ˈaɪtəmz, and "benefits": ˈbɛnəfɪts), while "trees" ends with the "z" sound (as in triz). So, the underlined part of "trees" differs from the other three in pronunciation.
Answer: B. trees
7. The words "hopes", "picks", and "shows" all end with the "s" sound (as in hoʊps, "picks": pɪks, and "shows": ʃoʊz), while "collects" ends with the "kts" sound (as in kəˈlɛkts). So, the underlined part of "collects" differs from the other three in pronunciation.
Answer: A. collects
8. The words "bags" and "ways" end with the "z" sound (as in bægz and weɪz), while "events" and "suggestions" have a different pronunciation, but "suggestions" ends with the "s" sound (as in səˈʤɛsʧənz) and "events" ends with the "nts" sound (as in ɪˈvɛnts). "Suggestions" has an "s" and so does not stand out, so we are left with "bags" and "ways" and "events" "events" has the ipa with "nts", hence the answer is events
Answer: C. events
9. The words "sources" and "videos" and "awards" all end with the "z" sound (as in ˈsɔrsəz, "videos": ˈvɪdioʊz, and əˈwɔrdz) while "activities" ends with the "iz" sound (as in ækˈtɪvɪtiz). So, the underlined part of "activities" differs from the other three in pronunciation.
Answer: B. activities
10. The words "prepares" and "helps" and "cleans" end with the "z" sound (as in pərˈpɛrz, hɛlps and klinz), while "carns" ends with the "nz" sound (as in kɑrnz). So, the underlined part of "carns" differs from the other three in pronunciation.
Answer: D. carns
I'll help you with each question.
Question 11: A. routine B. believe C. housework D. support
Analyze: 'routine' stressed at second syllable, 'believe' stressed at second syllable, 'housework' stressed at first syllable, 'support' stressed at second syllable
Answer: C. housework
Question 12: A. manner B. happy C. achieve D. moment
Analyze: 'manner' stressed at first syllable, 'happy' stressed at first syllable, 'achieve' stressed at second syllable, 'moment' stressed at first syllable
Answer: C. achieve
Question 13: A. develop B. family C. teenager D. celebrate
Analyze: 'develop' stressed at second syllable, 'family' stressed at first syllable, 'teenager' stressed at first syllable, 'celebrate' stressed at first syllable
Answer: A. develop
Question 14: A. social B. artist C. award D. famous
Analyze: 'social' stressed at first syllable, 'artist' stressed at first syllable, 'award' stressed at second syllable, 'famous' stressed at first syllable
Answer: C. award
Question 15: A. enjoy B. perform C. suffer D. agree
Analyze: 'enjoy' stressed at second syllable, 'perform' stressed at second syllable, 'suffer' stressed at first syllable, 'agree' stressed at second syllable
Answer: C. suffer
Question 16: A. campaign B. global C. balance D. carbon
Analyze: 'campaign' stressed at second syllable, 'global' stressed at first syllable, 'balance' stressed at first syllable, 'carbon' stressed at first syllable
Answer: A. campaign
Question 17: A. pollution B. continue C. enormous D. disappear
Analyze: 'pollution' stressed at second syllable, 'continue' stressed at second syllable, 'enormous' stressed at second syllable, 'disappear' stressed at third syllable
Answer: D. disappear
Question 18: A. theatre B. movie C. famous D. attend
Analyze: 'theatre' stressed at first syllable, 'movie' stressed at first syllable, 'famous' stressed at first syllable, 'attend' stressed at second syllable
Answer: D. attend
Question 19: A. adopt B. respect C. issue D. protect
Analyze: 'adopt' stressed at second syllable, 'respect' stressed at second syllable, 'issue' stressed at first syllable, 'protect' stressed at second syllable
Answer: C. issue
Question 20: A. awareness B. important C. organize D. material
Analyze: 'awareness' stressed at second syllable, 'important' stressed at second syllable, 'organize' stressed at first syllable, 'material' stressed at second syllable
Answer: C. organize
21. C. share
22. D. endangered
23. B. cutting down on
24. D. chores