Here are the words with the underlined part pronounced differently:

1. **C. of** (The "o" in "of" is pronounced like /ʌv/, while the others have different vowels or vowel sounds.)
2. **D. live** (In this context, "live" is pronounced with a short "i" as /lɪv/, while the others have a different vowel sound.)
3. **A. enough** (The "ough" in "enough" is pronounced /ʌf/, while the others have different vowel sounds.)
4. **D. phrase** (The "ph" in "phrase" is pronounced like /feɪz/, while the others start with different sounds.)
5. **A. festival** (The "e" in "festival" sounds different from the 'o' in "of", 'i' in "friend", and 'a' in "family.")

So the answers are:
1. C
2. D
3. A
4. D
5. A