Problem: How does the sentence end?

Matthew cooked a fancy pasta dinner for Neil last night because 
Answer: Matthew loves to cook.

Problem: How does the sentence end?

Bike riding gets Mike's heart rate and breathing going faster than jogging, so the 
Answer: jogging is the more tame activity.

Problem: How does the sentence end?

It was winter and Felicia wanted to hold Katrina's hands, because 
Answer: Katrina hands were warm.

Problem: How does the sentence end?

Samantha was trying to have a serious conversation, but Christine kept being goofy, so 
Answer:
Christine was unable to hear their point.