[Q]: How does the sentence end?

In gym class, Kayla was known to be in shape while Rebecca was not because

[A]: Rebecca was a nerd.

[Q]: How does the sentence end?

Studying hard in high school was more important for William but not Joseph because

[A]: Joseph had no desire to go to college.

[Q]: How does the sentence end?

Michael is a very talented singer unlike Robert because

[A]:
Robert took sports lessons when he was younger.