Here are the answers based on the pronunciation of the underlined parts:

1. D. singer (the 'i' in 'singer' is pronounced differently than the others)
2. A. surfing (the 'u' in 'surfing' is pronounced differently than the others)
3. D. picture (the 'u' in 'picture' is pronounced differently than the others)
4. B. hobby (the 'o' in 'hobby' is pronounced differently than the others)
5. A. donated (the first 'd' sound in 'donated' is pronounced differently)
6. C. reduced (the 'u' in 'reduced' is pronounced differently)
7. A. saved (the 'a' in 'saved' is pronounced differently)
8. D. cleaned (the 'ea' in 'cleaned' is pronounced differently)
9. C. knives (the 'i' in 'knives' is pronounced differently than the others)
10. A. paragraph (the 'a' in 'paragraph' is pronounced differently than the others)
11. C. dear (the 'ea' in 'dear' is pronounced differently than the others)
12. C. founded (the 'ou' in 'founded' is pronounced differently than the others)
13. B. collage (the 'o' in 'collage' is pronounced differently than the others)
14. A. provide (the 'o' in 'provide' is pronounced differently than the others)
15. D. discuss (the 'u' in 'discuss' is pronounced differently than the others)
16. D. high (the 'igh' in 'high' is pronounced differently than the others)
17. A. collect (the 'o' in 'collect' is pronounced differently than the others)
18. B. donate (the 'o' in 'donate' is pronounced differently than the others)

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