Your attention, please! ________ today is Professor Yu Dan from Beijing Normal University.
Not until he called the secretary three times ______ that the manager went to an important meeting.
---- You don’t go to that supermarket quite often, do you? ---- No, I only go there ______ because it’s too far away from my house.
During the reconstruction of the city, many modern tall buildings went up ______ old shabby houses were torn down.
---- Can you hand in your composition tomorrow? ---- Sure. ______ it handed in on time, I’ll stay up tonight.
It is human nature to think back to a golden age ______ one’s country was strong and respected.