The Red Cross is an organization _________ purpose includes offering help to victims (受难者) of disasters.
The doctor will be free ________.
The train leaves at 6:00 p.m.So I have to be at the station ________5:40 p.m.at the latest.
I must thank my parents ________to be a college student.
People living in the area where there is a lack of electricity often keep a supply of candles ________power failure.
Many large cities,such as Liverpool and New York,have had experiments of this kind,________old factories turned into successful art centers.