Problem: Continue the following story.

The car was losing pace with the truck in the race, as the 
Here's how I want to continue it: car was weakening its acceleration.

Problem: Continue the following story.

He put the tooth under his pillow and made sure it did not end up under his blanket, as under the 
Here's how I want to continue it: pillow it would be safe from loss.

Problem: Continue the following story.

Susan was making a cake for a party and she had an egg but didn't have milk. It was necessary to go to the store for the 
Here's how I want to continue it:
milk .