On the day the world (end/ended/ent) , the fate of mankind was carried in a small metal box.
In a secret location, architects, scientists and engineers (met/meet/meeted) and concluded that there was only one hope for our future: to build an underground city designed to (kept/keeped/keep) its citizens protected for generations to come.
“Secure the box. Set it for 200 years.”
“We’ll (keep/kept/kep) them in the city for 200 years”
“Will that be long enough?
“None of us can be certain of anything. We can hope.”
“Growing up with no knowledge of a world outside, future generations will be spared sorrow for what they’ve (lose/losed/lost) . For the good of all mankind.”
The box (was/were/beed) entrusted to the first mayor, who was to pass it on to her successor.
As the years counted down, the box (pass/passed/past) from mayor to mayor. None (knew/known/know) what secrets it held, only that it would open when it was needed most.
But fate (run/runned/ran) another course, and the chain was broken. The box was tucked away and (forgotten/forget/forgot) .
And as the city (grew/grown/grow) old and (begin/began/begun) to crumble, the box quietly (clicked/clack/clacked) open.