Here are the answers for each line based on the pronunciation of the underlined parts:

1. **C. doubt** - The "ou" in "doubt" is pronounced differently from the "o" in the other options.
2. **A. read** - The past tense "read" is pronounced like "red" while the others have different vowel sounds.
3. **A. this** - The "th" in "this" is pronounced differently from the other options, which use the "th" sound.
4. **A. wicked** - The "ed" in "wicked" is pronounced as /ɪd/, whereas the others have different pronunciations for "ed" at the end.

So, the words with differently pronounced parts are:
1. C. doubt
2. A. read
3. A. this
4. A. wicked