1.   At the site, rescue workers have been searching systematically in the hope of finding more survivors.

2.   High-tech listening equipment was used to find survivors in the rubble.

3.   Rescuers are working round the clock to find survivors of the blast.

4.   It is just conceivable that a single survivor might be found.

5.   Rescuers have not yet abandoned hope that more survivors will be found.

6.   Almost everything was stacked against finding more survivors.

7.   Although each passing hour diminished the optimism for finding survivors, officials were hesitant to shift their focus from rescue efforts to a wholesale bulldozing and hauling of rubble.

8.   As the night wore on, and with the temperature near freezing, officials said they had little hope of finding more survivors.

9.   As he waited to return to the hospital, Dr. Tuggle doubted any more survivors would be found.

10.   As night deepened, officials were able to bring in cranes and heavy shovels to begin moving rubble in hopes of finding survivors.