The retired man donated most of his saving to the school damaged by the earthquake in Yushu,___the students to return to their classroom
The glass doors have taken the place of the wooden ones at the entrance,in the natural light during the day.
Hardly could he ________ this amount of work in such a short time.
________ fire, all exits must be kept clear.
I wanted to catch ________early train, but couldn’t get ________ ride to the station.
— Could you turn the TV down a little bit? — ________. Is it disturbing you?