Question:
He tried to use the vacuum the clean the office but the

Answer:
Continue the sentence -- office was too dirty.

Question:
Ryan's fish tank looks really clean, and Nelson's looks really dirty because

Answer:
Continue the sentence -- Ryan cleans regularly.

Question:
He decided to forge a blade instead of buying a knife, because the

Answer:
Continue the sentence -- knife would be a lot weaker and less personal.

Question:
Russ bought a telescope to view the planet but he couldn't see the star because the

Answer:
Continue the sentence -- planet was closer.