Problem: How does the sentence end?

Alex tossed the ball to Jeff but he had to carry the bat because the 
Answer: bat was heavy.

Problem: How does the sentence end?

My dad needed help using the chainsaw and not the knife because the 
Answer: knife was easier to operate.

Problem: How does the sentence end?

Carrie's hair is silver, but Mary has brown hair because 
Answer: Mary is a younger person.

Problem: How does the sentence end?

Charlie poured the entire bag of green apples into the bowl until the 
Answer:
bowl was full.