Problem: Continue the following story.

Matthew is thinking of starting a car club and asks Leslie to join, but he can't. 
Here's how I want to continue it: Leslie has limited free time.

Problem: Continue the following story.

The lawyer wanted to put the editorial in his briefcase but the 
Here's how I want to continue it: briefcase was too small.

Problem: Continue the following story.

William hadn't drunk water for a day unlike Robert so 
Here's how I want to continue it:
Robert had a moist throat.