Now most families have only one child _____ our country’s one-child policy.
--Would you mind opening the window? It’s too hot.--__________.
—Listen ! Helen is singing in the next room.—It __________ be Helen. She is in Tianjin now.
_________ exciting match it is! Wonderful players and wonderful teams!
Which of the following signs means you can escape from the fire?
Don’t shout to the boy. It __________rude.