Problem: How does the sentence end?

Matthew was happy to heat very hot soup but Justin was not because 
Answer: Justin was sensitive to temperature.

Problem: How does the sentence end?

Jennifer was better at playing sports than Laura was because 
Answer: Jennifer was much more athletic.

Problem: How does the sentence end?

My legs hurt more after walking through the store than they did when I walked through the mall because the floors at the 
Answer: mall were carpeted.

Problem: How does the sentence end?

Carrie went to Samantha's doctor's office so they could look at her ear, because 
Answer:
Samantha had expertise in this.