I.Choose the word whose underlined part is pronounced differently:
1. A. sees B. sports C. pools D. trains
2. A. books B. floors C. combs D. drums
3. A. cats B. tapes C. rides D. cooks
4. A. walks B. begins C. helps D. cuts
5. A. arms B. suits C. chairs D. boards
6. A. boxes B. classes C. potatoes D. finishes
7. A. dreams B. mountains C. kills D. tasks
8. A. resources B. stages C. serves D. focuses
9. A. helps B. laughs C. cooks D. finds
10. A. hours B. fathers C. beds D. thinks