— Robert is indeed a wise man.— Oh, yes. How often I have regretted __________ his advice!
—How does their factory________ their products? —Through a separate sales company.
He was too busily occupied _____ to the show.
We must _____ a new chair for the broken one.
My camera can be________ to take pictures in cloudy or sunny conditions.
After the accident,the police spent a week finding out the person who________ it.