- Cats are ______ dogs.
- It is not understood _________ be good for your health.
- _____ that Stonehenge was built for religious purposes.
- While many college students like to play frisbee, ______ do not.
- Never before _______ as rapidly as during the last century.
- ______ the weather, I managed to get to the top of the mountain.
- None of the kids _____ a pet.
- After the baby cries, ________ sleepy.
- Once the War of Independence had been won, America _________ to become an independent country.
- ____ the Romans, iron working was prevalent throughout Europe.