From each number, pick out the word whose underlined part is pronounced differently from the others

V. From each number, pick out the word whose underlined part is pronounced differently from the others.
1. A. out B. round C. about D. would
2. A. chair B. check C. machine D. child
3. A. too B. soon C. good D. food
4. A. though B. enough C. cough D. rough
5. A. happy B. hour C. high D. hotel