Giúp mình với (giải thích)

Exercise 1: Circle A, B, C or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. 1. A. healthy B. fitness C. strength D. mental - The correct answer is B. fitness. The "i" sound in "fitness" is different from the "e" sound in the other three words. 2. A. health B. enthusiasm C. strength D. without - The correct answer is D. without. The "ou" sound in "without" is different from the "e" sound in the other three words. 3. A. muscle B. suffer C. yoghurt D. instruct - The correct answer is C. yoghurt. The "ou" sound in "yoghurt" is different from the "u" sound in the other three words. 4. A. fresh B. diet C. flesh D. exercise - The correct answer is C. flesh. The "e" sound in "flesh" is different from the "e" sound in the other three words. 5. a. yoga B. fatty C. balance D. habit - The correct answer is B. fatty. The "a" sound in "fatty" is different from the "o" sound in the other three words. 6. A. haange B. stayed C. happened D. stopped - The correct answer is A. haange. The "a" sound in "haange" is different from the "a" sound in the other three words. 7. A. pieces B. muscles C. decades D. labels - The correct answer is C. decades. The "e" sound in "decades" is different from the "i" sound in the other three words. 8. A. headache B. chip C. choose D. cheese - The correct answer is B. chip. The "i" sound in "chip" is different from the "e" sound in the other three words. 9. A. suffer B. muscle C. sugar D. instruct - The correct answer is C. sugar. The "u" sound in "sugar" is different from the "u" sound in the other three words. 10. A. ingredient B. nutrient C. micron D. mineral - The correct answer is C. micron. The "i" sound in "micron" is different from the "i" sound in the other three words.