Problem: Continue the following story.

Matthew threw a grape at Kenneth, because
Here's how I want to continue it: Kenneth thought they could catch it in their mouth.

Problem: Continue the following story.

Climbing trees doesn't appeal to Randy, but Kyle loves it, because
Here's how I want to continue it: Randy is poor at it.

Problem: Continue the following story.

Emily had to show Samantha how to make paper mache out of water and flour because
Here's how I want to continue it:
Emily had the necessary knowledge.