Problem: How does the sentence end?

Emily took longer to walk the mile than Mary did although 
Answer: Mary had more problems with their joints.

Problem: How does the sentence end?

Christine was suffering from problems with their sinuses but not Rebecca because 
Answer: Christine had a lot of allergies.

Problem: How does the sentence end?

I decided to use the brown bread instead of the white bread to make breakfast since the 
Answer: brown bread seemed fresher.

Problem: How does the sentence end?

Dennis was exhausted at the end of the day but Robert wasn't although 
Answer:
Robert had spent the day planting trees.