Problem: How does the sentence end?

Mary never did as well on tests in high school as Lindsey because 
Answer: Lindsey always paid attention in class.

Problem: How does the sentence end?

Federico couldn't see in the bedroom when coming from the bathroom for the 
Answer: bathroom was too bright.

Problem: How does the sentence end?

Cynthia loved to go hiking in the mountains while Samantha thought it was boring because 
Answer: Cynthia was somewhat athletic.

Problem: How does the sentence end?

The man realized he had gotten the lens for his glasses instead of his camera, the 
Answer:
camera lens was much thicker.