Answer:
21. G
22. E
23. B
24. D
25. F
26. A
27. C
28. A
29. F
30. B
31. G
32. A
33. A
34. E
35. G
36. F
37. C
38. B
39. D
40. F
Step-by-step explanation:
A good way to remember notes in the bass clef is spaces: All Cows Eat Grass (ACEG), and lines: Great Big Dogs Fight Animals (GBDFA).