--Steven has got the first prize in the math contest. --____ he looks so happy today.
John _____ knowledge of radio just by staying around the radio station.
The _____ of his clothes indicated too clearly that he had been playing football.
When the entire class worked together they finished the project _____.
Paper making began in China and from there it _____ to North Africa and Europe.
Children who are over-protected by their parents may become _____.