You'd better not have the light _____ all day long.

He ran all the way to the station only _______________ the train had already left.

 He is thinking of           his business while his father is strongly against it for fear of the further positive effect of the global economic crisis. . 

When he looked up, he suddenly found himself          by a group of teenagers, 

________ our achievements, we are firmly convinced we’ll be able to achieve the final victory.