We arrived at the station ____ the train had left.
After the long journey, the Smiths returned home, ____.
Not everyone has realized what_______ important part the balance of________ nature plays in their life.
—Does Bill do his new job well?—____ his old job. I’m afraid there’s no hope for him.
____ our teacher will allow ____ early after examination?
Not until the heavy snow blocked the express ____ how serious the weather was.