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.
—__________the sports meeting is likely to be put off. —Yes,it all depends on the weather.
—My sister finished school three years ago. —What__________these years?
The couple __________.I really don’t know why.
—The Chinese astronaut Yang Liwei is here already. —I__________he__________until tomorrow.
SARS__________ in Hong Kong in the winter of 2002.