Mark the letter A, B, C, or D

I, Mark the letter A, B, C, or D on your answer sheet to indicate the word whose
bold part differs from the other three in pronunciation in each of the following
questions.
1. A. columnist B. frustrated C. study D. adulthood
2. A. helpline B. empathise C. embarrassed
3. A. tense B. decision C. skill D. house-keeping
4. A. stressed B. tense C. concentrate D. self-aware
5. A. delighted B. helpline C. advice D. decision
6. A. classmate B. pressure C. embarrass D. missing
7. A. surface B. artisan C. lacquer D. asset
8. A. authentic B. thread C. thereby D. theory
9. A. craftsman B. factor C. indicator D. concentrate
10. A. sculpture B. Failure C. Closure D. Structure
11. A. wandered B. embroidered C. preserved D. embarrassed
12. A. craft B. carve C. aware D. cast
D. depressed
13. A. surface B. drumhead C. multicultural D. frustrated
14. A. craftsman B. house-keeping C. cost D. preserve