Sure! Here are the words with the underlined part pronounced differently:

### I. Circle the word having the underlined part pronounced differently in each line:
1. **A. threw** (pronounced as /θruː/)
2. **B. took** (pronounced as /tʊk/)
3. **B. coupon** (pronounced as /ˈkuː.pɒn/)
4. **C. enough** (pronounced as /ɪˈnʌf/)
5. **C. sugar** (pronounced as /ˈʃʊɡər/)

### II. Circle the word which has a different stress pattern in each line:
1. **A. leisure** (pronounced as /ˈleʒ.ər/)
2. **B. delight** (stress on the second syllable)
3. **C. unusual** (stress on the second syllable)
4. **B. vacation** (stress on the second syllable)
5. **A. enjoy** (stress on the second syllable)

Let me know if you need any further assistance!