Part 1: Circle the word whose underlined part is pronounced differently from that of the others in each group.
1. A. pronounce
B. other
C. won
D. ton
2. A. headache
B. flame
C. shame
D. shadow
3. A. research
B. resent
C. recent
D. reservoir
4. A. guilty
B. suitcase
C. suitable
D. recruit
5. A. idiom
B. ideal
C. idle
D. idiot
