The of Green Olympics, High-tech Olympics and People’s Olympics will allow Beijing to become the focal point for tourists from across the globe.
It is known that water is not ___ endless resource , nor ____ that can be made once more.
_____in the queue for half an hour, the old man suddenly realized he had left the money in the car.
____ was known to all, John had broken his promise ___ he would stay with us for some time .
The Wenchuan earthquake in 2008 is believed ____more than 70,000 people and made thousands homeless, _____it perhaps the most destroying tsunami in history.
Berners-lee made ____possible for everyone to use the Internet.