—Can I pay the bill by check? —Sorry, sir. But it is the management rule of our hotel that payment ____ be made in cash.
One of the most popular Korean TV dramas of all time, Dae Jang Geum(《大长今》), _______in Hunan TV Station recently.
_______ in the regulations that you shouldn't tell other people the password of your e-mail account.
The manager, _______ it clear to us that he didn't agree with us, left the meeting room.
I'm moving to the countryside because the air there is much fresher than _______ in the city.
While watching television, _______.