Problem: How does the sentence end?

Jen tried using medication and then pollen to help her allergies, and she found that the 
Answer: pollen was more natural.

Problem: How does the sentence end?

It took Jennifer days to finish her project, while Elena finished in mere hours, unusual since 
Answer: Elena was usually the slow one.

Problem: How does the sentence end?

Quentin was learning a language and liked to practice more at the store than at his house because the 
Answer: store had more people.

Problem: How does the sentence end?

As a treatment for acne, I prefer cream to scrub as I find the 
Answer:
cream gentle on my skin.