Problem: How does the sentence end?

Jennifer gave their girlfriend a better gift than Monica gave to theirs because
Answer: Jennifer was richer.

Problem: How does the sentence end?

Donald was unable to restore the files to Nelson's computer after they were deleted, so
Answer: Nelson gave no payment.

Problem: How does the sentence end?

Robert was more of a loner than Brett because
Answer: Robert hated to talk to people.

Problem: How does the sentence end?

Elena decided to attend a seminar on self esteem but Christine did not as
Answer:
Christine was very confident.