Here are the answers for the words with differently pronounced parts:

1. **A. though** (the "ough" is pronounced /oʊ/)
2. **B. function** (the "c" is pronounced /k/)
3. **A. artisans** (the "a" is pronounced /ɑː/)
4. **B. laughed** (the "gh" is pronounced /t/)
5. **A. doubt** (the "ou" is pronounced /aʊ/)

For the last section where you need to mark the letter that differs:

6. **C. electrician** (the "e" is pronounced /ɪ/)
7. **C. suburb** (the "u" is pronounced /ʌ/)

Let me know if you need further assistance!