Problem: How does the sentence end?

The airport had more customers than the bus station because the
Answer: bus station had slower transportation.

Problem: How does the sentence end?

Dennis landed badly and thought they had an ACL injury but Kyle knew otherwise.
Answer: Dennis didn't have a medical degree.

Problem: How does the sentence end?

Carrie helped Natalie plan all of the company events for the conference because
Answer: Carrie was an assistant.

Problem: How does the sentence end?

Mary noticed Amy's accent so
Answer:
Mary asked her which country she had been a citizen of.