1. silk -

2. coat -

3. walk -

4. brick -

5. could -

6. rage -

7. tell -

8. glum -

9. clot -

10. slant -

11. cluck -

12. mouse -

13. block -

14. sling -

15. sack -

16. boy -

17. flow -

18. sad -

19. bled -

20. mail -