I was about to go to bed _____ one of my old classmates made a call to me.
The government has announced that a modern city will be set up in ____is still a wasteland now .
____________ we can’t get seems better than ____________ we have.
Sarah hopes to become a friend of _____________ shares her interests.
_____________ is a fact that English is accepted as an international language.
_____________ the Games will be held in Beijing is not known.