The text is about Brian Clark - one of only four persons on 84th floor to survive the attack of the World Trade Center on September 11th 2001 and Kevin, a firefighter.

- stay at home
Actually it was Kevin's day off. He would still be alive if he .

- follow Brian Clark down
He would have escaped if he .

- not ask him for help
He could have been out of the building in time if a woman .

- not decide to walk up
Kevin and the woman might have made it if the woman .

- be able to find them
Kevin and the woman could have been saved if the firefighters .