In a Word Puzzles

For each puzzle, find a common word that remains a word when the indicated letter is inserted into the word in either of the positions shown.
1. 2. 3.
4. 5. 6.
7. 8. 9.
10. 11. 12.
13. 14. 15.
16. 17. 18.
19. 20.
21. 22.
23. 24.
25. 26.
27. 28.
29. 30.
31. 32.
33.   34.
The solutions can be found here.