Problem: Continue the following story.

Since Robert was the math teacher of Benjamin, 
Here's how I want to continue it: Benjamin had their math problems graded over the weekend.

Problem: Continue the following story.

The botanist tried to put the seeds in his pockets but the 
Here's how I want to continue it: pockets were too small.

Problem: Continue the following story.

The old dog ran past Elena and up to Christine, because 
Here's how I want to continue it:
Christine had treats in their pocket.