Problem: How does the sentence end?

Ian ate a lot of turkey breast but not Kevin because 
Answer: Kevin was on a vegetarian diet.

Problem: How does the sentence end?

While the man modified the height of the bike, the boy rode the tricycle, because the 
Answer: bike was the incorrect height.

Problem: How does the sentence end?

When traveling abroad I always go to the local market and not the supermarket, because the 
Answer: market is usually cheaper.

Problem: How does the sentence end?

That Ian would have a more healthy immune system than Hunter was likely because 
Answer:
Hunter did not eat a lot of fruits and vegetables.