Most American cities are relatively small in terms of population when _____ with Chinese cities like Shanghai and Beijing．

______on both sides of the street _____ excited fans who wanted to see the famous singing star.

Not until the motorbike looked almost new _________ repairing and cleaning it.

 The girl is an excellent student but not once in these years________ caught being late.

 Not until midnight_____back from work, drunken .