Problem: Continue the following story.

The sand was filtered using the sift instead of the machine because the 
Here's how I want to continue it: sift was simple to use.

Problem: Continue the following story.

Steven was jealous of the high income Nick was paid at his job because 
Here's how I want to continue it: Nick was wealthy.

Problem: Continue the following story.

the blood poured out of the vain as the veins could not support its pressure, the 
Here's how I want to continue it:
pressure were too high.