Paper making began in China and from there it _____ to North Africa and Europe.
--- He was nearly killed by a car once. --- Oh. when was________ exactly? --- It was in 2002 __________ he was riding a bike on the drive-way.
The students expect there ______ more reviewing classes before the final exam.
______ the secret of nature, the young scientist has little time for entertainment.
_________ into a famous university made his parents very happy.
________the working efficiency, the boss allows the employees to have a coffee break.