—Waiter!—Yes?—Three_________,please.
Chinese GDP has been growing steadily year by year, _________ second in the world now.
You can go out, _________ you promise to be back before 11 o'clock.
Unless _________ by the police, you should keep silent over the accident.
The media today can draw public attention to situation ________ help is actually needed.
_________ in the mountain for more than 2 days, the climbers looked pale and weak.