[Q]: How does the sentence end?

Katrina was better at writing essays than Samantha, so

[A]: Katrina easily passed all of their classes.

[Q]: How does the sentence end?

Tyler really wanted his friend to buy him a bike instead of a skateboard, so he was thrilled by the

[A]: bike he got.

[Q]: How does the sentence end?

It was very late so Nick told Craig to go to bed, he had to obey because

[A]:
Craig was younger.