Question

29) A: Why are your hands so dirty?
B: I
in the garden.
a) have been working b) was working
c) worked
d) have worked
30) Why didn't you ask me for help?
a) I may have helped you.
b) I wouldn't have helped you.
c) I shouldn't have helped you.
d) I would have helped you.​

Answer 1

29 had been working

30 would have helped you