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

1. **C. flutes** (the "u" in flutes is pronounced differently)
2. **C. feature** (the "ea" in feature is pronounced differently)
3. **B. flew** (the "ew" in flew is pronounced differently)
4. **C. heart** (the "ea" in heart is pronounced differently)
5. **C. promised** (the "i" in promised is pronounced differently)

For the second part regarding primary stress:

6. **D. communal** (the primary stress is on the second syllable, differing from the others)
7. **B. orange** (the primary stress differs compared to the others)

If you have any further questions or need clarification, feel free to ask!