I. Which underlined sound is pronounced differently in each group. 1. A. planet B. trash C. understand D. waste 2. A. postcard B. pagoda C. tower D. ocean 3. A. cow B. now C. how D. throw...

To determine the underlined sound that is pronounced differently in each group, we need to analyze the International Phonetic Alphabet (IPA) notations of each word. Group 1: - planet: ˈplænət (the "a" is pronounced as /æ/) - trash: træʃ (the "a" is pronounced as /æ/) - understand: əndərˈstænd (the "u" is pronounced as /ʌ/) - waste: weɪst (the "a" is pronounced as /eɪ/) The underlined sound that is pronounced differently is "a" in "waste", which is /eɪ/, whereas the other words have /æ/. Group 2: - postcard: ˈpoʊstkɑrd (the "o" is pronounced as /oʊ/) - pagoda: pəˈgoʊdə (the "o" is pronounced as /oʊ/) - tower: taʊər (the "ow" is pronounced as /aʊ/) - ocean: ˈoʊʃən (the "o" is pronounced as /oʊ/) The underlined sound that is pronounced differently is "ow" in "tower", which is /aʊ/, whereas the other words have /oʊ/. Group 3: - cow: kaʊ (the "ow" is pronounced as /aʊ/) - now: naʊ (the "ow" is pronounced as /aʊ/) - how: haʊ (the "ow" is pronounced as /aʊ/) - throw: θroʊ (the "o" is pronounced as /oʊ/) The underlined sound that is pronounced differently is "o" in "throw", which is /oʊ/, whereas the other words have /aʊ/. Group 4: - theater: ˈθieɪtər (the "ea" is pronounced as /iː/) - earth: ərθ (the "ea" is pronounced as /ɜː/) - both: boʊθ (the "o" is pronounced as /oʊ/) - Thursday: ˈθərzdi (the "u" is not pronounced like any of the above options, "ur" is pronounced as /ɜːz/) However, analyzing the "ea", "o", and "ur" in the above words we find the underlined sound that is pronounced differently is "ea" in "theater", which is /iː/, whereas "ea" in "earth" is /ɜː/ and "o" in "both" is /oʊ/, however "ea" and "o" aren't in the same group. Therefore we can see "ea" and "o" aren't the answer and "ea" in "theater" isn't in the same group as "ur" in "Thursday", so "ea" isn't the answer. "ea" in "earth" and "ur" in "Thursday" are in the same group and "ea" in "earth" is pronounced as /ɜː/ and "ur" in "Thursday" is pronounced as /ɜːz/ in some cases /ərzdi/ "ur" and "er" are the same in most dialects. Group 5: - each: iʧ (the "ea" is pronounced as /iː/) - sea: si (the "ea" is pronounced as /i/) - create: kriˈeɪt (the "ea" is pronounced as /eɪ/) - idea: aɪˈdiə (the "i" is pronounced as /aɪ/) The underlined sound that is pronounced differently is "ea" in "each", which is /iː/, and also "ea" in "sea", which is /i/, whereas the other words have /eɪ/