Choose the word whose underlined part is pronounced differently from the others

I. Choose the word whose underlined part is pronounced differently from the others.
1 A. burn B. hurt C. birth D. singer
2. A. surfing B. colour C. opinion D. above
3. A. mother B. badminton C. learn D. picture
4. A. about B. hobby C. collect D. player
5. A. donated B. provided C. flooded D. changed
6. A. helped B. worked C. reduced D. followed
7. A. saved B. interested C. volunteered D. enjoyed
8. A. cooked B. watered C. followed D. cleaned
9. A. flu B. laugh C. knives D. leaf
10. A. paragraph B. flower C. enough D. vitamin
11. A. near B. learn C. dear D. clear
12. A. knocked B. needed C. founded D. wanted
13. A. volunteer B. collage C. community D. doctor
14. A. provide B. individual C. situation D. children
15. A. tutor B. student C. university D. discuss
16. A. cough B. laugh C. enough D. high
17. A. collect B. clean C. city D. cracker
18. A. blanket B. donate C. calorie D. allergy