Unfortunately, George cannot be with us today so I ampleased to accept this award _______ him.

The terrible rainstorm hit the small villages and .—How unlucky the villagers were!

It was in 1990 ______ the medicine was tested on human patients.

Ladies and gentlemen, please ______ seated until the plane has come to a complete stop.

The boy has been going back home later _____, which worries his parents.[ ]