Problem: How does the sentence end?

Mary would care for Amy when they were kids since 
Answer: Mary was the older one.

Problem: How does the sentence end?

Emily dressed as Harry Potter for Halloween, but Cynthia went as a black cat, because 
Answer: Emily was a super fan.

Problem: How does the sentence end?

I was able to read more articles than stories because the 
Answer: articles were shorter in length.

Problem: How does the sentence end?

Kyle gained 20 pounds last year while Randy gained 2, because 
Answer:
Randy ate lower calories food.