Problem: How does the sentence end?

Matthew asked Justin the proper way for storing ginger since 
Answer: Justin knew how do do it correctly.

Problem: How does the sentence end?

I decided to use conditioner instead of shampoo on my hair, the 
Answer: shampoo removes more moisture.

Problem: How does the sentence end?

Laura hitched their trailer to Kayla's truck, because 
Answer: Laura had a car that was worse for towing.

Problem: How does the sentence end?

Being a boss comes natural to Michael it never has for Leslie, 
Answer:
Leslie is not a  suitable leader for others.