I have to go to school by bus because my bicycle _____.
Further reading made me realize that it was hard work and determination as well as her good nature _____ had got her into medical school.
Discovered by the Portuguese in 1506 and _____ in 1810, the island belongs to the Great Britain and has a population of a few hundred.
Perhaps the best sign of _____ computer and internet use pushes up demand for paper comes from the high-tech industry itself.
Until recently, land in large area of Stockholm belonged either to the crown or to the city; there was _____ thing as private ownership of land.
Some people disagree with the idea _____ digital textbook will improve education quality while the traditional textbook is out of date.