Marla was rummaging through some boxes in the attic and found a stack of letters her great-grandfather wrote when he
was stationed in North Africa during World War II. One of the letters included these lines:
"Last week we almost ran out of fuel. Most of our training was cancelled. This week we received double the usual amounts.
I guess it's feast or famine around here."
Using the context of the letter as a clue, what does the phrase feast or famine mean?

(1) fire extended humans’ geographical boundaries by allowing them to travel into regions that were previously too cold to explore. (2) it also kept predators away, allowing early humans to sleep securely. (3) fire, in fact, has been a significant factor in human development and progress in many ways. (4) other obvious benefits of fire are its uses in cooking and in hunting. (5) probably even more important, however, is that learning to control fire allowed people to change the very rhythm of their lives. (6) before fire, the human daily cycle coincided with the rising and setting of the sun. (7) with fire, though, humans gained time to think and talk about the day’s events and to prepare strategies for coping with tomorrow. the sentence that expresses the main idea is: (type the number of the sentence. then click “go.”)