Half the world's population __________ water shortages within 15 years according to the World Bank, just one of many recent alarming reports on the world's fresh water supply.
All that can be said ______.
Tom with his friends ______ volleyball since three o’clock.
Peter was ______ to come to school this morning.
Every means ______ tried, yet no result ______encouraging up to now.
Fifty-six ______ twenty-seven makes eighty-three.