---Why was Mr. Smith suddenly fired by his boss?---Because he was found_______ in the non-smoking office.
– Are you cleaning my room? – I can’t help _____. I can’t bear seeing people’s room in a mess!
He thought that painting copied by a modern artist was ______ great value and bought it ____ over a thousand dollars.
Let him who tied the bell onto the tiger take it off -- _____ started the trouble should end it.
. Social networking is an important factor _______ business success.
During the expedition in the mountains we passed through a place where in a little while we all lost out ______ of direction.