Problem: How does the sentence end?

William wrote the script for their film, while Kevin was the director, because 
Answer: Kevin was better with people.

Problem: How does the sentence end?

I allow my kids to download puzzle apps, not anime apps, I think the 
Answer: puzzle apps are educational.

Problem: How does the sentence end?

Dennis had to answer to their boss at work but not Lawrence because 
Answer: Dennis is working.

Problem: How does the sentence end?

Rebecca picked up Amy to carpool to work every day, so 
Answer:
Rebecca asked for some gas money.