Problem: Continue the following story.

After the knee surgery he tried to use walker but switched to wheelchair, because the 
Here's how I want to continue it: wheelchair was more comfortable.

Problem: Continue the following story.

It was easy to see that Erin but not Sarah was a good waitress because 
Here's how I want to continue it: Erin received a few tips on a daily basis.

Problem: Continue the following story.

Christine praised Carrie about their abs, because 
Here's how I want to continue it:
Carrie had been working out more in the gym.