Exercise 1 1. A. proofs B. books C. points D. days 2. A. asks B. breathes C. breaths D. hopes 3. A. sees B. sports C. pools D. trains 4. A. tombs B. lamps C. brakes D. invites 5. A. books B. floors C. combs D. drums 6. A. cats B. tapes C. rides D. cooks 7. A. cats B. tapes C. rides D. cooks 8. A. walks B. begins C. helps D. cuts 9. A. shoots B. grounds C. concentrates D. forests 10. A. helps B. laughs C. cooks D. finds 11. A. hours B. fathers C. dreams D. thinks 12. A. beds B. doors C. plays D. students 13. A. arms B. suits C. chairs D. boards 14. A. boxes B. classes C. potatoes D. finishes 15. A. relieves B. invents C. buys D. deals 16. A. dreams B. heals C. kills D. tasks 17. A. sounds B. cleans C. preserves D. focuses 18. A. carriages B. whistles C. assures D. costumes 19. A. offers B. mounts C. pollens D. swords 20. A. miles B. words C. accidents D. names 21. A. sports B. households C. minds D. Plays