---Could you help me take care of my pet dog on the 19th?--- I’m afraid I’m not          that day.

1. Every possible means should be made full use of _______ the lives of the injured people in subway tunnel collapse

Thanks to our ___ schedule, we got our task accomplished ahead of time．

After the explosion，the roads are full of ________people leaving the city. 

(2009安徽合肥质检)The police tried to get some clues from the suspect，but he remained     ．