Problem: How does the sentence end?

The acorn that I ate for a snack chipped my tooth because the 
Answer: acorn was hard.

Problem: How does the sentence end?

Rachel had always loved dogs but Amy was a cat person, as 
Answer: Rachel was bitten by a cat as a child.

Problem: How does the sentence end?

Bob poured the entire bag of plain chip into the serving bowl for the party until the 
Answer: bag was empty.

Problem: How does the sentence end?

Erin had a lower credit score than Monica because 
Answer:
Monica was mostly careful with their money.