　The alarm was first gone off on the third floor. 1.
People left the building hurriedly but in a orderly manner. 2.
They came out carry their shopping bags and their parcels， 3.
some not properly wrapped and some not even paid. 4.
Most passer by waited in the street to watch.Many of the 5.
shops and offices in the street had just closed.Mr Clement， 6.
the officer in charge of，ordered all hoses(软管) 7.
to turned to the roof of the main building.People were pushed 8.
back from the area of their own safety.Seven officers 9.
entered the basement or were driven back within minutes. 10.
Hurriedly they put on their masks(防毒面具)，ready to try again.