Consider this:
Your boss has assigned you some work(A), which you don't like to do. You have other things to do which you like. Your boss doesn't ask you about (A) for 20-30 days (or may be never asks). Would you still finish (A), just because you have to do or procrastinate indefinetly till s/he inquires?
I am not sure if this is appropriate for this forum, if not please move.
Thanks a lot!