Past; passed is the verb form; pass is also a verb form and a noun
The answer would be thesis statement
Tom Godwin's chosen title for his short story "The Cold Equations" refers to the cold, factual mathematical equations that were used to calculate Marilyn's fate.The first equation refers to the one the computers that govern the Stardustcruiser and the Emergency Dispatch Ships (EDS) use to calculate how much fuel to load Barton's EDS with so that he will safely arrive on Wooden to fulfill his emergency mission. The conflict of the story...
