Here are the words whose underlined parts are pronounced differently from the others for each item:

1. **A. present** (the "pre" is pronounced differently; it can also mean a gift)
2. **B. chess** (the "ch" is pronounced as /tʃ/, while the others start with a hard "h" sound)
3. **C. house** (the "ou" is pronounced differently from the "u" in the others)
4. **C. sure** (the "ure" is pronounced /ʃʊr/, which is different from the others)
5. **B. celebrate** (the "e" in the second syllable is pronounced differently compared to the other words)

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