His first lecture is of great use to our development. But his latest one is ______ worth attending.
Meeting my uncle after all these years was an unforgettable moment, __ I will always treasure.
One is not born a ____; one becomes a _____.
The professor said he wouldn’t attend the opening ceremony ____.
. —He hasn’t gone to the office up to now. —Well, he ____.
Mr. Black, ___ born in Kentucky, lived and practiced law in Missouri.