Problem: How does the sentence end?

Doing English homework was easy for Erin while Monica struggled because
Answer: Erin was a great writer .

Problem: How does the sentence end?

The wedding of Betty was extravagant, while Christine had the opposite.
Answer: Betty is more likely the big shot banker.

Problem: How does the sentence end?

Logan demanded that Robert clean the upholstery in the family car, because
Answer: Robert was the one who made the stain.

Problem: How does the sentence end?

Kayla ignored the child, while Tanya played happily with the kid, because
Answer:
Kayla found children to be annoying.