sentence: They used the leather strap to sharpen the razors but didn't need it for the scissors, as the OPTIONS:
- razors were so sharp.
- scissors were so sharp.
complete: scissors were so sharp.

sentence: The puppies had weak eyes but sharp ears because the OPTIONS:
- eyes develop much faster in growing animals.
- ears develop much faster in growing animals.
complete: ears develop much faster in growing animals.

sentence: Bob spent more money on food than he did on the candy, because the OPTIONS:
- food was healthier.
- candy was healthier.
complete:
food was healthier.