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Here are the answers to the questions: 1. C. dynamite The words "amount," "achieve," and "deforestation" have an underlined part pronounced as /ə/ (schwa sound) while "dynamite" has the underlined part pronounced as /aɪ/ (diphthong). 2. D. environment The words "complain," "conserve," and "cover" have an underlined part pronounced as /ə/ (schwa sound) while "environment" has the underlined part pronounced as /aɪ/ (diphthong). 3. D. persuade The words "protect," "conservation," and "currency" have an underlined part pronounced as /ɛ/ or /ə/ (schwa sound) while "persuade" has the underlined part pronounced as /weɪ/ (diphthong). 4. D. cover The words "complaint," "recycle," and "secondhand" have an underlined part pronounced as /eɪ/ or /ɛ/ while "cover" has the underlined part pronounced as /ʌ/ (schwa sound). 5. A. walked The words "filled," "died," and "played" have an underlined part pronounced as /ɪ/, /aɪ/, and /eɪ/ (diphthongs) respectively, while "walked" has the underlined part pronounced as /ɔ/ (monophthong). 6. B. mass The words "wrap" and "area" have an underlined part pronounced as /æ/ (open front unrounded vowel) while "mass" has the underlined part pronounced as /a/ (open front unrounded vowel). 7. C. post The words "flow" and "ocean" have an underlined part pronounced as /oʊ/ (diphthong) while "post" has the underlined part pronounced as /oʊ/ (monophthong, close back rounded vowel). 8. A. refreshment The words "environment," "reduce" have an underlined part pronounced as /ɪ/, /i/ (near-close near-front unrounded vowel), while "refreshment" has the underlined part pronounced as /rɛ/ (open mid front unrounded vowel). 9. D. campus The words "treasure," "deforestation," "sewage," and "save" have an underlined part pronounced as /eɪ/, /i/, /ɪ/, and /aɪ/ (diphthongs), while "campus" has the underlined part pronounced as /æ/ (open front unrounded vowel). 10. A. spoil The words "folk," "Float," and "Violent" have an underlined part pronounced as /oʊ/ (diphthong) while "spoil" has the underlined part pronounced as /ɔɪ/ (diphthong). Here are the answers with explanations: 1. A. appliance B. activity C. adventure Answer: B. activity Explanation: The underlined part in 'activity' is pronounced as /æk/ (ækˈtɪvɪti), while 'appliance' has /ə/ (əˈplaɪəns) and 'adventure' has /əd/ (ədˈvɛnʧər). The vowel sound in 'activity' is distinct from the others. 2. A. chemical B. effective D. average Answer: A. chemical Explanation: The underlined part in 'chemical' is pronounced as /kɛm/ (ˈkɛmɪkəl), while 'effective' has /ifɛ/ (ˈifɛktɪv) and 'average' has /æv/ (ˈævərɪʤ). The starting consonant sound in 'chemical' is distinct from the others. 3. A. sewage C. experience D. biology Answer: A. sewage Explanation: The underlined part in 'sewage' is pronounced as /suɪ/ (suɪʤ), while 'experience' has /ɪk/ (ɪkˈspɪriəns) and 'biology' has /baɪ/ (baɪˈɑləʤi). The vowel sound in 'sewage' is distinct from the others. B. pollution Answer: B. pollution Explanation: The underlined part in 'pollution' is pronounced as /pəˈlu/ (pəˈluʃən), while 'prevention' has /prɪ/ (prɪˈvɛnt) and 'provision' has /prə/ (prəˈvaɪd). The starting vowel sound in 'pollution' is distinct from the others. 4. A. plumber B. label C. innovation Answer: B. label Explanation: The underlined part in 'label' is pronounced as /leɪ/ (ˈleɪbəl), while 'plumber' has /pl/ (ˈpləmər) and 'innovation' has /ɪnə/ (ɪnəˈveɪʃən). The vowel sound in 'label' is distinct from the others. 5. A. garbage D. nuclear Answer: A. garbage Explanation: The underlined part in 'garbage' is pronounced as /gɑr/ (ˈgɑrbɪʤ), while 'junkyard' has /ʤəŋ/ (ˈʤəŋkjɑrd) and 'nuclear' has /nuk/ (ˈnukliər). The starting consonant sound in 'garbage' is distinct from the others. 6. A. collected B. published C. protected D. provided Answer: B. published Explanation: The underlined part in 'published' is pronounced as /pəˈbl/ (ˈpəblɪʃt), while 'collected' has /kəˈlɛ/ (kəˈlɛktəd), 'protected' has /prəˈtɛ/ (prəˈtɛktɪd), and 'provided' has /prəˈvaɪ/ (prəˈvaɪdɪd). The vowel sound in 'published' is distinct from the others. 7. A. recycle B. refreshment C. creatures D. reuse Answer: B. refreshment Explanation: The underlined part in 'refreshment' is pronounced as /rəˈfr/ (rəˈfrɛʃmənt), while 'recycle' has /riˈsaɪ/ (riˈsaɪkəl), 'creatures' has /kri/ (ˈkriʧərz), and 'reuse' has /riˈjuz/ (riˈjuz). The starting vowel sound in 'refreshment' is distinct from the others. 8. A. innovation B. intermediate C. deforestation D. comparison Answer: C. deforestation Explanation: The underlined part in 'deforestation' is pronounced as /dɪfɔr/ (dɪfɔrɪˈsteɪʃən), while 'innovation' has /ɪnə/ (ɪnəˈveɪʃən), 'intermediate' has /ɪnər/ (ɪnərˈmidiɪt), and 'comparison' has /kəm/ (kəmˈpɛrəsən). The starting consonant sound in 'deforestation' is distinct from the others. 9. A. garbage B. problem C. solution D. sewage Answer: A. garbage Explanation: The underlined part in 'garbage' is pronounced as /gɑrb/ (ˈgɑrbɪʤ), while 'problem' has /prɑbl/ (ˈprɑbləm), 'solution' has /səˈlu/ (səˈluʃən), and 'sewage' has /suɪʤ/ (suɪʤ). The starting consonant sound in 'garbage' is distinct from the others. 10. A. nuclear B. suggest C. solar D. solid Answer: C. solar Explanation: The underlined part in 'solar' is pronounced as /soʊl/ (ˈsoʊlər), while 'nuclear' has /nuk/ (ˈnukliər), 'suggest' has /səˈʤɛ/ (səˈʤɛst), and 'solid' has /sɑl/ (ˈsɑləd). The vowel sound in 'solar' is distinct from the others. Tôi có thể giúp gì cho bạn không? Bạn muốn tôi thực hiện một nhiệm vụ cụ thể nào từ các thông tin trên không?