Problem: How does the sentence end?

Emptying the litter box was a dreaded chore for Adam while Lawrence didn't mind doing it. 
Answer: Adam always tried to get someone else to handle it.

Problem: How does the sentence end?

We often cleaned up with vinegar instead of cleaner because the 
Answer: vinegar was much cheaper.

Problem: How does the sentence end?

During the traffic jam, Justin cheered up Derrick since 
Answer: Derrick was having a bad day and their finger hurt.

Problem: How does the sentence end?

Ryan decided to buy the paintings for Craig, and 
Answer:
Ryan was broke because of the purchase.