Problem: How does the sentence end?

The chemist poured the liquid out of the flask and into the container until the
Answer: flask was empty.

Problem: How does the sentence end?

Jessica wants to clean colored grout so she asks her friend Rebecca for help, because
Answer: Rebecca is good at cleaning.

Problem: How does the sentence end?

Robert followed the strategy of Donald on the football team because
Answer: Donald was the team leader.

Problem: How does the sentence end?

Jeffrey spent most of his allowance to pay for a gift to give Randy because
Answer:
Jeffrey feels sorry for him.