.Was it in 2000_________he was still in middle school_________this boy became an expert at computer?
The conference was _______ fixed for the 10th, August, but later the unexpected landslide(泥石流) in Zhouqu in Gansu province, made us put it off.
It is human nature to think back to a golden age ______ one’s country was strong and respected.
The British government often says that providing children with ______ to the information superhighway is of great importance.
The young man, ______ several attempts to beat the world record in high jumping, decided to have another try.
During the reconstruction of the city, many modern tall buildings went up ______ old shabby houses were torn down.