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.
People are always on the go , so they spend their weekend on housework .
On the third floor there are two rooms, _____ is used as a meeting-room.
—Are you satisfied with her work, sir?—Not at all. It couldn’t be any _______.
—You know our manager has been in hospital for days?— Yes. I wonder if he is ____ better now.
When you cross the street, you can never be _______ careful.