Problem: How does the sentence end?

Michael asked Christopher if she could attend his class; when he said no,
Answer: Michael felt disappointed.

Problem: How does the sentence end?

While at the gym, Derrick was teaching Benjamin how to do bicep curls because
Answer: Derrick was a personal trainer.

Problem: How does the sentence end?

I really don't like the new icons compared to the old designs, because the
Answer: designs are great.

Problem: How does the sentence end?

The cake was baked by Jennifer but not Erin because
Answer:
Erin was terrible at baking.