Problem: How does the sentence end?

I couldn't pass my math class even though I hired a private tutor. I guess the
Answer: tutor was too inept.

Problem: How does the sentence end?

The seamstress needed to hem the jeans of Katrina but not Lindsey because
Answer: Katrina was very short.

Problem: How does the sentence end?

Monica decided to buy Sarah a new laptop since
Answer: Monica had enough money to buy a new one.

Problem: How does the sentence end?

His shoe got completely worn out during the race because the
Answer:
race was very long.