Problem: How does the sentence end?

Having a successful and healthy pregnancy was more likely for Rebecca than Mary, because 
Answer: Rebecca had better access to healthcare.

Problem: How does the sentence end?

Having a relationship is hard work but I prefer that I receive letters rather than gifts since the 
Answer: letters are homemade.

Problem: How does the sentence end?

Samuel was asked to bring a cake to work but not tell Michael. 
Answer: Samuel had to keep a it a secret.

Problem: How does the sentence end?

To clean better, Johnny replaced his regular toothbrush with an electric toothbrush. The 
Answer:
regular toothbrush cleaned worse.