He was busy writing a story, only ____ once in a while to smoke a cigarette. A. to stop B stopping C to have stopped D having stopped
He thought this was the first pair of shoes that had fitted him _____.
I feel sure that _____ qualification, ability and experience, you are abundantly suited to the position we have in mind.
Children who are over-protected by their parents may become _____.
Paper making began in China and from there it _____ to North Africa and Europe.