Problem: How does the sentence end?

Tanya made sure to always wear makeup compared to Felicia because 
Answer: Felicia was not vain.

Problem: How does the sentence end?

The man tried to hide the ring inside the box but the 
Answer: box was too small.

Problem: How does the sentence end?

Mark used a towel on the windshield of his car because the 
Answer: windshield was wet.

Problem: How does the sentence end?

Hunter lived at high altitude and hike frequently while Nick lived at seal level, so 
Answer:
Nick got altitude sickness when they drove high up the mountain.