I’ve been working on this puzzle for hours. It’s the largest puzzle I’ve ever worked on, and it’s really difficult. I enjoyed the challenge in the beginning, but now I’m out of patience. I think the best thing to do is go to sleep and start again in the morning when I’m calm.
A.
short fuse
B.
get cold feet
C.
open a can of worms
D.
at the end of my rope