1. **D. bear** - The bold part "ear" is pronounced differently from the other words, which have the "ear" sound as in "clear," "hear," and "near."

2. **C. shoulder** - The bold part "ould" is pronounced differently from the bold parts in the other words, which contain the "ou" sound.

3. **A. fail** - The bold part "ai" is pronounced differently from the bold parts in the other words, which all contain the "air" sound.