Problem: How does the sentence end?

Joel printed the document and prepared his quarterly presentation to Christopher, because 
Answer: Joel was paid to do so.

Problem: How does the sentence end?

Katrina was invited by Amy over to jump in a piles of leaves after 
Answer: Amy raked them into a pile.

Problem: How does the sentence end?

Brian decided to use a rake instead of a shovel for the leaves because the 
Answer: shovel couldn't grab them.

Problem: How does the sentence end?

Carrie prepared a big plate of pasta for Tanya, although 
Answer:
Tanya said it was not her favorite.