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Based on the pronunciation of each word, here are the answers: 1. The word with the main stress on the first syllable is: A. school school: skul (no stress mark is needed because there's only one syllable) However, if we consider the options and look for the word that does not have the main stress marked by "ˈ" on any syllable but the first one or the word with only one syllable, we'll have another answer. 1. The word with the main stress on the first syllable is: B. chapter chapter: ˈʧæptər (the main stress is on "chap") 2. The word with the main stress on the second syllable is: A. laughed laughed: læft (no stress mark is needed because there's only one syllable) However, if we consider the options and look for the word that does not have the main stress marked by "ˈ" on the first syllable but has a different syllable count, we'll have another answer. 2. The word with the main stress on the second syllable is: A. amused amused: əmˈjuzd (the main stress is on "mused") 3. The word with the main stress on the second syllable is: A. south south: saʊθ (no stress mark is needed because there's only one syllable) However, if we consider the options and look for the word that does not have the main stress marked by "ˈ" on the first syllable but has a different syllable count, we'll have another answer. 3. The word with the main stress on the second syllable is: B. about about: əˈbaʊt (the main stress is on "bout") 4. The word with the main stress on the first syllable is: D. face face: feɪs (no stress mark is needed because there's only one syllable) However, if we consider the options and look for the word that does not have the main stress marked by "ˈ" on any syllable but the first one or the word with only one syllable, we'll have another answer. 4. The word with the main stress on the first syllable is: A. ancient ancient: ˈeɪnʧənt (the main stress is on "an") 5. The word with the main stress on the third syllable is: C. extended extended: ɪkˈstɛndɪd (the main stress is on "tend") However, if we consider the options and look for the word that does not have the main stress marked by "ˈ" on the first syllable, we'll have another answer. 5. The word with the main stress on the third syllable is: C. extended extended: ɪkˈstɛndɪd (the main stress is on "tend")