Problem: How does the sentence end?

Robert but not Samuel was scared of marriage because 
Answer: Samuel did not have two prior marriages that failed.

Problem: How does the sentence end?

Kenneth buys a bottle of nectar for the hummingbird feeder but Joel watches TV. 
Answer: Kenneth is fascinated by birds.

Problem: How does the sentence end?

Cynthia planned to adopt kids, while Natalie already had given birth to 4 children, since 
Answer: Natalie was fertile.

Problem: How does the sentence end?

They struggled to feed the crowd cake at the wedding because the 
Answer:
cake was small.