To keep healthy, Professor Johnson ______ cycling as a regular form of exercise after he retired.
He disappeared last month, _______ we have heard nothing of him.
He insisted that he _______ nothing wrong and that he _______ now.
She was so amused with the magician’s tricks that she ________ a smile.
They believe that there is __________ in the world.
The old man lives in the _______ island_______, but he doesn’t feel ______.