As many successful businessmen believe, courage is as ______ to pioneering work as the intelligence, even more so.
The manager was satisfied to see many new products ______ after great effort.
Until now, we have raised 50.000 pounds for the poor children, ______ is quite unexpected.
Was it because Jack came late for school ______ Mr. Smith got angry?
Grandma pointed to the hospital and said, "That's ______ I was born."
She'd lived in London and Manchester, but she liked ______ and moved to Cambridge.