Here are the words with different stress patterns for each question:

1. **C History** - The other words (Cathedral, Gallery, Factory) have the stress on the second syllable, while "History" has the stress on the first syllable.

2. **C Opera** - The other words (Capital, Different, Tradition) have the stress on the first syllable, while "Opera" has the stress on the second syllable.

3. **D Successful** - The other words (Interesting, Surprising, Amusing) are stressed on the second syllable, while "Successful" is stressed on the second syllable.

4. **C Benefit** - The other words (Understand, Engineer, Vietnamese) have the stress on the last syllable, while "Benefit" has the stress on the first syllable.

5. **B Police** - The other words (Peaceful, Pollute, Compare) have stress on the second syllable or the first; "Police" has a different pattern as it's one syllable.

6. **B Duty** - The other words (Cleaning, Beauty, Pollute) all consist of two syllables and have stress on the first syllable, while "Duty" is one syllable.

7. **D Police** - The other words (Palace, Temple, Statue) have two syllables and stress on the first, while "Police" is one syllable.

Note: For questions involving more nuanced phonetic patterns or multiple syllables, more contextual knowledge about language rules may refine the answer.