—I wonder why Mr. Green hasn't showed up at the meeting yet. —I'm not sure, but he __________ in a traffic jam driving here.
It is generally agreed _________ education is vital for the development of individuals and the well-being of society.
George is _________ a very serious man, but as a matter of fact he has a great sense of humour.
He has learned to get on with all kinds of people and _________ todifferent ways of life.
The town has _________ population of ten thousand and 80% of _________ population are peasants.
Though he have been here for several weeks, he still couldn't —_________ to the life here.