1. prison
2. who
3. beach
4. gym
5. window
6. hall
7. bread
8. birthday
9. come
10. worked
11. bank
12. learned
13. energetic
14. thin
15. teacher
16. snorkel
17. pomegranate
18. require
19. concern
20. wharf
1.d 2.a 3.b 4.d 5.b 6.c 7.a 8.b 9.b 10.d 11.a 12.c 13.c 14.a 15.a 16.b 17.c 18.a 19.c 20.d