Problem: How does the sentence end?

Neil had dental problem while Samuel did not because 
Answer: Samuel did not eat a lot of sweets and visited the dentist regularly.

Problem: How does the sentence end?

Rachel was naturally bossy, unlike Katrina who was shy. 
Answer: Rachel loved to be in charge.

Problem: How does the sentence end?

Craig always gets angry while Matthew is always calm, so 
Answer: Craig yelled when they got a bad grade.

Problem: How does the sentence end?

The man lost weight after he burned fat and lost some muscle, the 
Answer:
muscle was heavier.