Problem: How does the sentence end?

Neil has been to the hospital for injury many times while Michael only once, you can say 
Answer: Michael is careful.

Problem: How does the sentence end?

Emily liked cleaning the stone patio but not Mary because 
Answer: Emily is efficient at cleaning.

Problem: How does the sentence end?

Steven was healthier than Kyle because 
Answer: Kyle didn't drink oatmeal water each morning to stay full during exercising.

Problem: How does the sentence end?

I used a smoker to cook the meat instead of the oven. On the 
Answer:
smoker it's faster.