It was not until the subprime loan crisis(次贷危机) ____ great damage to the American financial system that Americans ____ the severity of the situation.
A computer can only do ____ you have instructed it to do.
He asked ____ for a violin.
What the doctors really doubt is my mother will recover from the serious disease soon.
It is generally considered unwise to give a child _____he or she wants.
______leaves the room last ought to turn off the lights.